I bought the Rain Design mStand for my wife. She works from home and there mostly on a MacBook. After she unfortunately had a herniated disc in the cervical spine, we had to think seriously how we could improve their work - the mStand is one of the results. By using the mStand their posture at the desk is more natural and better. They also use an external keyboard and mouse.
The workmanship is very good. The look is good (fits nicely with Apple products) and, the functionality as described 100%.
A star deduction there but due to the price, which appears relatively high, given the cost of materials. Design has to be paid up also, and ultimately that's OK.