Ok, we are about two months in using a Stihl FS100RX. I will be comparing this trimmer to redmax, shindiawa & echo. The good: The Stihl is well balanced and feels good in your hand. It has good high end power with little vibration. The trigger lock is great because its made for starting the machine but it holds the throttle at 50% unlike most models that the trigger lock holds at like 90% So you can walk around trimming a house with the trigger lock on. SEEMS LIKE A WELL CONSTUCTED MACHINE THAT WILL GIVE YEARS OF SERVICE. The bad: Bogs on hard throttle, does not rev up as quick as the redmax or shindy. The engineer team should be shot. You can not use this to edge, it will melt the skin off your shoulder (bad muffler design). This is the HARDEST head I have ever had to load string into, come on really its 2010. The verdict: Well constructed, built to last. Powerful. Good for ONLY trimming, NO edging. NOT user friendly. Would not buy buy it again if I could go back. POOR engineering.