Pros: It does the job of what I bought it for originally. Acting as a RAM holder for GBA roms on the NDS.

Cons: I could not get it working as RAM for the DS web browser. I could not get the rumble pack function working too, as I had to get a separate module for each to get working.

Other Thoughts:

Bottomline: If you really want to go out of your way to play GBA games on your NDS then go ahead and buy this, but I feel that I have wasted a bit of dough already as I can already play GBA games on my mobile phone or my computer. If you can get the other functions working on NDS then that's great.

Pros: Easy to use with GBA Exploder. If using card for NDS Browser you must patch your NDS Browser with the appropriate patch for your card. a good place to start would be here;
[URL]http://www.gbatemp.net/lofiversion/index.php/t130659.html[URL]

Cons: Requires some research to make work with NDS Browser (Google is your friend).

Other Thoughts: Manufacturer should include some software so users do not have to search out the right place for rom patchers.

Bottomline: Great price and does what it says if you know what you're doing.

Pros: + This device is fairly easy to use (once you figure it out).
+ The browser is pretty easy to set up when an unsecured access point is present.
+ Rumble adds a new dimension to DS play with rumble enabled games.
+ Plays GBA games without a problem.
+ Can use AIM clients via Opera browser (required refreshing, but was still pretty impressive.)

Cons: - Does not come with instructions on how to use or load. (You may have to search google or youtube for help if needed--as I did.)
- Loading and playing GBA games can be a bit confusing(I need to play around with it more).
- Loading GBA games takes a few seconds, but is worth the wait.
- Rumble only works with rumble enabled games (limited choices).
- Rumble generates a somewhat loud buzz--may not be the best device to use in quiet places.

Other Thoughts: I have only used it for the extra RAM for the web browser, 1 GBA game and the rumble pack (which is pretty mush what it is advertised for). Not sure it was the most practical purchase for me, but it is a great Slot-2 cover when not in use.
Works fine with my CycloDS Evolution. Have not tested with my R4 HDSC or EZ-Flash V.

Bottomline: This device can prove handy for those GBA enthusiasts. Get yourself a large MicroSD card, and your choices will be endless. The rumble adds a nice touch to DS play (when enabled).
If you have a black DS, the black version blends right in. Overall, worth the money.

Pros: 3 in 1. you only need one feature you got two more.
works out of the box very easily with acekard 2.1+akaio. just plug and play, navigate to a .gba file and run it, it will automatically copy the file from slot1 to the slot2 memory then run it. same for the rumble, just set rumble level in the menu, all rumble-capable games will use it without further fuss. same for the opera browser.
build quality is superb.

Cons: 3 in 1. you only need one feature still you have to pay all three. you can not buy a memory expansion pak or gba pak by itself.
rumble levels middle and high are extremely loud. no, really, it is disturbing and feels unwelcome even alone at home.
expensive (for 2 memory chip and a motor).
matte black.

Other Thoughts: the ds rumble feature is REALLY useless. i've tested ALL 34 english games which are on the wikipedia page, the results are: 1 game is rather nice (actionloop), 1 game is tolerable (metroid pinball), 32 games are useless/awkward/inconvenient/unsuitable/inappropriate/unpleasant/clumsy/really-really bad experience. especially racing games. very bad job there nintendo.

Bottomline: if you need the browser or gba games, buy this. in fact you have no other option than buying this...
however if you need rumble... think it again :D ok, if you really need it, buy a rumble pak.