Pros: >just plug it in to the computer, go to usb mode on the ds, and drag and drop like any normal usb flash drive
>at least $10 cheaper than all the other websites
>no software to download or install
>works with almost any game
>u only need the slot 2 cartridge when connecting to the computer, then u play from the slot 1 cart (without the slot 2 cart in)
>u can use multiple slot 1 carts with jus one link/slot 2 cart

Cons: >my first one had a bad link and wouldn't connect to the computer. unfortunately i hadn't saved the reciept, but i had enuf money that i jus bought a second one. that one had a good link and now i hav twice the memory (they both work with the same link)
>file transfers seem slow compared to normal flash drives, but its really no problem if ur not repeatedly changing wats on it. iv done one big transfer for each, and havnt gone back to the computer yet
>even tho they're advertising the one for NDS lite, i got the one for original NDS. it works jus fine, but when i link, the slot 2 cart sticks out like gba carts do. its not a problem, but this is cons, and i did notice that.
>one more REALLY small thing, the link can seem to be connected to the slot 2 cart when it isnt. it took me a couple tries to find out. jus make sure u push it in until the metal part is all the way in. u'll feel it seem to stop about half way
>u cant link it to a computer without the slot 2 cart in, so u cant link to a computer with a DSi. i don't have one, but i know that the DSi doesnt have the slot 2
>zelda phantom hourglass wont save. i hear others have this problem, but its the only game i hear about. i have some that go black at some point and stop playing, but that was probably jus a bad dump

Other Thoughts: >when i first connected it, McAfee said it removed a file because it thought it was a threat, and yet it still works. idk if this contributed to any of those game problems i jus mentioned, but if u have McAfee or some other virus scaner of that level, be careful

Bottomline: SAVE YOUR RECIEPT!!!! u may not get a good link, and u need to be prepared to return ur product. or u can jus buy another and get more memory to use with watever good link u get
as long as u get a good link, this is one of the best NDS products to have

Pros: Good build quality. There is no need for micro sd cards like some other ds cards for eg. R4's and N5's. Sometimes kids tend to play with the micro sd cards and lose them.

Cons: It is a bit more expensive than other cards but not having to buy a micro sd helps.
I've had some trouble with some games not playing on it and they dont seem to update the firmware as regularly as id like

Other Thoughts:

Bottomline: A good card. If your new to these they are very easy to set up and use. Basic drag and drop even a child could do it.

Pros: Just a great card, good support worldwide too, but nowhere on the globe as cheap and easy as dealextreme.com. Never had any problems delivering to Europe.
Complete package with everything on it, super.

Cons: It came loaded... with a virus on it. Complete with autorun.inf so if you don't have antivirus you are screwed. I order this card for like 6 months now, for maybe 30 or 40 of them but the last batch of 7 all had virusses on it. The Win32/PEMask virus. All my first card didn't have this.
My friend in the UK ordered his one weeks before me and still doesn't have it though, 9 weeks now.

Other Thoughts:

Bottomline: I will surely buy one again when another friend needs one, i'm sure of it.

Pros: It is a normal DS-card, not with Micro SD memory (solid!).
Easy to use
No extra software needed on a PC to install games
Menu is easy and works fine. Also cheats can be used

Cons: You must need the GBA-port to install (homebrew ) games, which is an extra handling before install games (f.e. the R4 doesn't need this!)

Other Thoughts: The shipment to quit a while to get in the Netherlands

Bottomline: Perfect solution for my kids. Quite easy to use and not to expensive. I get a lot of questions to order this.