Did you use it for longer periods of time?
My guess is, it still is subject to issues with heat/stuttering, lackluster wifi performance. The fact still remains that these devices still cannot (yet) compete with a traditional rig.
After trying a few, $20 or $30 is the most I would shell out to play with one of these since I know their limitations. For $100 I would plunk that same cash into a modest HTPC that can perform more reliably.