I cannot agree more. I have purchased the wrist rest, the trackball and the extra key module, after ~5 months of daily usage (9-10 hrs per day) of the "basic"

I cannot agree more. I have purchased the wrist rest, the trackball and the extra key module, after ~5 months of daily usage (9-10 hrs per day) of the "basic" UHK v2. It's a fantastic keyboard and it is totally worth the expense.