Jeremy, I am a month into the use of my treadmill desk and I too can't see myself going back to a full time sitting desk. Do I have more energy yes...has my productivity improved yes...the focus thing I have not noticed any changes. My purchase was less about losing weight as it was about teh ill effects of sitting for 10+ hours a day...the research is VERY alarming. I have varied how I use the desk and find that I am more successfull with using it during blocks of time...I mean when I started I would walk for 15-30 minutes each hour as many of the bloggers and Dr Levine recommends...i find it better for me especially with transferring items back and forth that I select tasks best associated to use the desk---emailing in the AM, phone conferences, lunch break are great ways to get in larger 1-2 hour blocks at a time. I too was skeptical about long term use and was looking at the Steelcase and the Lifespan...for 1/4 of the price and some pretty good reviews I settled on the Lifespan. Also, check out sites like www.officewalkers.ning.com that is where I got my start...