What a shame it is to see one of the most promising flash kits we've seen to go down the pan. The DS-Xtreme, perhaps one of the most advanced carts hardware-wise has been completely let down by the team and their ignorance. We have seen just 1 or 2 decent updates to the cart around the time of its public release, but ever since the team have been quiet.
The team always stated that the cart was only ever officially designed for home brew use and all official updates made no mention of improved game compatibility even if these issues were addressed. Unfortunately for the team, the largest majority of their potential customer base are going to be interested in playing game backups. Regardless of this, the team haven't improved upon home brew support anyway. As of today the DS-Xtreme's game compatibility is quite poor, most games requiring a manual "hacking" of the internal ROM files to get them to work -- a simple fix which a few other flash carts had the same problem with until they were updated.
The teams support forum has also taken a turn for the worse, with members being banned left, right and centre for asking questions such as why there have been no updates. One of the updates the team released even ended up bricking some customers devices under certain conditions, leaving them inoperable. Even after this fiasco, the team didn't respond for over a week.
Do I go on? The DS-Xtreme cannot be recommended due to Team DS-X's lack of support. There are plenty of other flash kits out there that have accelerated past the DS-Xtreme in terms of support for both game backups and homebrew, with better GUIs and customer support (even from Chinese based teams - as opposed to Team DS-X being based in Europe).
It would be nice to see Team DS-X go out with some dignity by releasing the source code to the public, allowing for talented people out there to update the cart themselves, which would be a nice gift for all those who own a DS-Xtreme.
I end by saying, DO NOT even contemplate buying a DS-Xtreme, and please do not support any future products from Team DS-X.