I have no technical problems. The only tricky part was setting up my controller (good old PS2), as I did have to mess with emulation and things like that. In the end, I just have to run a xboxdrv script before running the game. If you have an original Xbox controller it shouldn’t be a problem.
EDIT: If you were asking about the cloud gaming experience, it’s pretty good I would say. The image will not be as good as a “physical” Xbox, and probably you will have to deal with queues depending on your location. But, overall, it’s a pretty good deal.