I can say that this new keyboard has been a huge help with my carpal tunnel issues. It took me about a week to get my speed close to my old speed and even yet, I'm not quite as fluent. However, I get faster every day. I'm probably up to 45 wpm now.
As far as pain, it's MUCH BETTER! Not all gone by any means. I still have problems at night with numbness; however, I just learned from my doctor, that thyroid increases problems with carpal tunnel. I had my thyroid removed in January this year. She said that this could be aggravating the issue. We are still working on getting the medicine adjusted. So the good news is, this problem should go away with time. Maybe I will get a full night's sleep sometime in the near future!