Pros: I originally was apprehensive about this cart brand, but it seems to be one of the better albeit less popular ones. I haven't had a single issue running games on the current firmware. You just have to make sure you get the latest, 1.90 beta release. I tried the 1.87 or whatever the latest "stable" one was and no game I tried would save.

Cons: Like I said, you just have to make sure you get the latest 1.90 beta firmware. This is very unclear as there are no instructions and no software bundled with the device. I had formatting issues as well, as it would not even load the first couple tries. Even with community help this was fairly unclear, I kind of found my own way. This is all behind me now, with good firmware and a good formatter tool, I'm doing great and enjoying the cart.

Other Thoughts: A useful tip would be to track down the Panasonic SDFormatter software to format your microSD chip. The Windows utility is terrible and slow.

Bottomline: Get the latest firmware, and the SDFormatter, and a decent microSD chip. I keep reading varying statements that this does or does not take SDHC chips. I have not tested this, but my 2gb Kingston SD-C02G chip holds more than enough. If you really need more then go ahead and try, but I don't know if the supplied microSD-usb adapter takes SDHC.
This cartridge works if you can figure out what to do to make it work. Once you do its golden.

Pros: Cheap
Easy to use
Side-loading slot for the Micro SD card

Cons: Unreliable
Slow
not too sure about the sticker on the front - I suppose it can be removed.

Other Thoughts: This card is unreliable. Some games won't load at all, others crash when a save is taking place. Seems to be a bit slow too. Such a shame

Bottomline: If you want an Ez-Flash card, get the V Plus. I've owned one of them for a while and it's a far better card. This card's been a big disappointment - I can't rely on it. I hope a firmware update will eliminate the problems.

Pros: -Plays backup games
-Plays homebrew games
-Works really nice and easy

Cons: -Build quality wasn't the best. I own the IV, and they was a sticker over the other side of the cartridge, and it really looked cheap.
-Updates from the website are really slow to download.

Other Thoughts:

Bottomline: Really nice adapter, uses microSD cards, love it.
Works well, would definitely buy again. I bought 4 for me and my friends, and no one had problems with it. I've got mine for over a year now, and it still works as good as day 1.

Pros: - Easy drag and drop here, no crazy software involved.
- Mac and PC compatible, as long as you have a TransFlash to USB or something, it's just a matter of drag and drop.
- Interface is simple and easy to use and understand, great for kids (can be skinned if you know how).
- Build quality is great, will last for a long time and can suffer a few drops.
- Plays music, video (weird format) and will open images, turns your DS into a PMP
- Save yourself hundreds from games that you buy and end up not playing!

Cons: - Slot for the TransFlash is a little tight, you will need fingernails to remove the TransFlash cards.
- The cart itself is a bit thick, but it represents no problems.
- No real instructions are included, but usage is dead easy.
- Although interface is nice and simple, it is a bit ugly.

Other Thoughts:

Bottomline: If you own a DS, and you don't have one of these, YOU MUST buy one! Save yourself hundreds of dollars from buying games you'll probably play once or twice.. with this you can have tonnes of games in one single cartridge.
It'll also open up the media capabilities of your DS, allowing you to play music, videos (albeit a weird format), images etc.
Also a great gift idea, if you're a parent buy one for your kids and save yourself hundreds from buying games that your kids wont play.