In my experience (which includes both the new and old MCE keyboards as well as others) the diNovo edge is the best HTPC keyboard (with HTPC keyboard i mean a pretty small keyboard that has buildin pointer device).
Yes, I'm sure the diNovo is five times better than the TVISTO keyboard, but it's also five times more expensive
I'm trying to set up a htpc out of old components (m-atx mobo, sempron 2800+ cpu, etc.) and the TVISTO cheap mce wireless keyboard seemed the perfect match (less than 40€).
As I only have XP pro, I wanted to know it this keyboard will work (like the microsoft mce). The specs from the web page are somewhat misleading...