I purchased mine this summer from dreamworks, it was the first turbine I have owned with internal valves. Everything about it so far has been a dream; super easy and clean installation, first start and every start after has been super smooth, it runs like a Swiss Watch, and the small back-lit GSU can easily be mounted in your airplane. I have about a dozen flights on it now. Overall I'm super impressed with my 100xbl and looking forward to purchasing another one next year.