By some accident have ended up with 3 different wifi SD cards the... * 8 GB eye-fi pro x2 * 8GB Toshiba FlashAir * 8 GB Ez share card So here is a brief review of how they work with Olympus cameras (OMD and EPL5). First of all a couple of words of warning. None of these cards is inherently fast - class 6 I believe. Eye-fi have just announced a class 10 16 GB card but even that does not match the fastest write times of certain SD cards. This is a deal breaker for some people. It obviously doesnt bother me much - I have never run into any buffer problems even taking multiple photos for HDR. Secondly I wouldnt recommend these cards for transfering RAW photos to a PC or tablet because transfer by wifi is simply too slow. Wifi transfers about 20 jpeg photos a minute. I shoot RAW + jpeg and transfer my jpegs to my ipad via wifi (for review, sorting and tagging). The wifi card that everyone has heard of is the eye-fi card. It works differently to the other two cards. It is designed to 'push' or 'transmit' photos from the camera to a pc, the internet or a smartphone or tablet. It has a reputation for being troublesome and flakey. Principle problems are... (1) It is reasonably tricky to configure properly at set up with the eye-fi software. (2) Users often have connection problems at home because their home network overrides the cards network on their tablet which needs to be manually selected. (3) The connection is dropped if the camera goes into sleep mode which can happen quite often during transfer. The card itself is toggled off and on by a menu in Olympus cameras (and the card is compatible with all the current range of cameras). The card has to be set up on the PC to either transmit 'all' or 'selected' photos - photos are then selected in camera using the protect key. There is no ability to preview photos in camera on a smartphone (prior to download) or select from your smartphone/tablet. At first glance these restrictions might make the 'eye-fi' seem an unattractive option. However, it does have a number of advantages over other cards. The card can be configured to just download jpeg from a RAW + jpeg shoot. (The wifi on the GH3 for instance will only let you download 'all' photos.) The card can be configured to work with Shuttersnitch and Photosmith Apps which are two popular mobile workflow progs. (In particular the Photosmith App enables you to circumvent the irritating problem that the Apple IOS renames your files when it saves them to your camera roll - this is a problem if you are syncing metadata changes to your jpegs back to your RAW files on your computer.) The eye-fi card works well once you have got it set up properly and you are used to using it. I will be sticking with it for my OMD. The Toshiba FlashAir works in conjunction with the new EPL5 and EPM2 as well as the Olympus App. Rather like the eye-fi card it has to be switched on in the camera. Considering no other Olympus cameras are compatible with it (and I doubt any Panas are) it simply wont work in those cameras (I tried putting it in the OMD but nothing happened.) The FlashAir card works in a different manner to the 'eye-fi'. The 'wi-fi' allows users to access the SD card from the smartphone/tablet and then 'pull' photos into the smart device to be stored. You can access the photos through your web browser but it is best done via the Olympus app. Setup takes 30 seconds. The connection is very robust and never drops even if the camera goes into sleep. You can preview (on a full ipad screen) your shots on the EPL5. The App only reads jpeg files (so you dont get two files if you shoot RAW + jpeg and you dont get anything if you shoot RAW.) Files can only be downloaded by selecting and downloading one at a time but at least you get a small preview of each file to help you choose. With the Olympus app once you have downloaded the file you can apply one of 12 Oly art filters to the photo. Another great advantage of the FlashAir is that it can be accessed from any number of smart devices (all you need to know is the password to the network connection). The FlashAir works great at what it does. It is a breeze to use. If you want to view the photos you took on a large screen or download a couple of pics and email them to someone it works virtually seamlessly with your smart device and anybody elses. Finally the EZ Share SD card. This is actually very similar to the FlashAir - it works by accessing the card via wifi from the smart device and then 'pulling' the photos into it. To switch this little card on and off there is a little switch on the side of the card itself. This means that it should work with any camera. It doesnt have any dedicated software (yet?) and sadly the Oly App doesnt recognize it. It sets up as easily as the FlashAir (less than 30 seconds) and all you do is go to your browser, once connected (to the card not the internet) and type in ez.com and your files on the SD show up with small previews. It is possible to look at large full screen previews of your files but it is a pain unlike the Olympus App. Downloading is better as it allows you to select several files at once (or in fact, all files) although if you shoot RAW + jpeg both RAW and jpeg files are shown. Like the FlashAir the Ez Share can be accessed from any device and, of course, you dont even have to download an App to use it. If you want to use wifi to simply download a few jpegs that you have just shot to immediately email out to someone or simply add to your device, you could find this handy. So that's about it really. Over the longer term one suspects that all these cards will be rendered redundant by in-camera wifi systems.