Pros: Very cheap as compared to other sites I was looking at. Its the real deal, not a fake. The Sakura GUI is definitly much better looking and funcitioning than other offerings.

Cons: The build quality isn't the best but it seems like it will last a long time, so long as you are not popping it in and out all the time. The rumble pack is incredibly loud and only works with a select few games anyways

Other Thoughts: The rumble pack should have been ditched by M3 team and the price lowered, it's a rather useless item. The card works great though and makes holding all my games on one card great!

Bottomline: Cheap card, not a fake and works great!

Pros: Pros:
Very easy to use, could train a monkey to operate it.
Plays every game I have tried on it.
Works with a variety of Micro SD cards.
It took about a week to arrive and the micro SD I ordered with it arrived two weeks later, which meant I had to wait two weeks to see if it worked. But it took about two minutues to put on all the software on the card and worked as soon as I put in my DS.

Cons: Cons:
It is a bit of a snug fit to get into the DS, the back of the card has a large scratch down the back of it, but doesn't effect the gameplay.
It dropped $5 in price since I brought mine, which is disappointing.
Getting the Mirco SD card in the M3 card can be a bit difficult at times due to the spring loading mechanism in it, but is easy once you get the hang of it.
Hard to argue anything about it really, does everything I tell it do and even for the price I paid it still fantastic value.
Most cards like these do drain your DS battery than a normal game, but it doesn't phase me.

Other Thoughts:

Bottomline: Easy to use, cheap, reliable, cheats, real time save, no way you can go wrong. Based on its features and price I would say it is one of the best cards available. Recommended it to all my friends and family who have now asked me to buy them one each. May not be compatible with the DSi, but the DSi looks like a waste of money imo.

Pros: - All the features you'd come to expect from a flash card now and more.
(DLDI auto-patching, real-time save, slow-motion, etc.)
- Good Build-Quality.
- Supports the M3 Sakura firmware which I think is easily the nicest menu you can currently have on a DS flash card. Nice fully-skinnable sliding interface.
- Can dual-boot M3 Sakura firmware and the regular "TouchPod" firmware.
- Through M3 Sakura, you can run many media file formats and ROMs in the same loader.
- Both firmwares are still being updated regularly for game and bug fixes along with new features.

Cons: - The normal "TouchPod" firmware is very slow.
- M3 Sakura doesn't have great homebrew compatibility, but you can always just dual-boot into the TouchPod firmware.

Other Thoughts: I've owned my M3 Real for more than a year, and it's my favorite flash card out of all the ones I've tried. (About five slot-1 cards and a few slot-2's.)
I'd say that the CycloDS is the most functional card you could get, although it has it's faults here and there. However, the M3 Real has the nicest and most functional firmware(M3 Sakura). You can read text, play music and movies and view pictures once you turn it on without needing to boot any homebrew, as well as loading games and homebrew.
It also just looks the best, being skinnable and it has a nice sliding interface, making it even quick and easy to get to files.
I haven't yet been disappointed by this card since I got it.
Also, no issues with memory cards so far. I've tried a 1GB SD, 2GB SD, 4GB SDHC and 8GB SDHC and they have all worked fine, in case you may be concerned with that.
Oh yeah, rumble pack isn't great, though. It's fine, but not great. I gave mine away.

Bottomline: Buy it if you want a reliable, good impressive card for DS that's still being updated. I think it's the best choice you could make.

Pros: Had this for a year now, and it's still going strong. No problems with build quality or any intermittent software issues. Exactly the same as the day I got it. Have had occasional problem with a rom not loading but that was fixed by updating the firmware on the card which is very easy to do! So it's been really problem free! Would not hesitate to recommend especially after long term ownership of this item.

Cons: None, although I haven't tried an SDHC card on it. My 2gb non-sdhc card has sufficed over this time.

Other Thoughts:

Bottomline: Good DS Card!