Haven't used their shifters, but have their front and rear derailleurs on two of my bikes and they work flawlessly. Furthermore, you can get colors to match your bike's paint scheme. Plain and simple - they work, and I won't hesitate to recommend or purchase a bike with them.
I checked out the 9-speed version on an F95 we had in for service--quite decent, a definite upgrade from Sora and just different (no better or worse) from Tiagra. The 10-speed version should compare favorably with 5600 (old 105). Regarding durability, though, it hasn't been on the road long enough for me to judge. There is an 8-speed version that Fuji used on their Newest 3.0 for a year. This one absolutely sucked. Microshift 9- and 10-speed controls have been on low-cost road bikes in the European market for several years.