I bought one of those cheap Russian efforts and it is not bad at all. You need to give the button a good press and it is very tactile meaning that you know when you haven't pessed it properly. I actually have only ever used it for timed turns, I do all my navigation timing with my sooper-dooper free with Pilot subscripiton wrist watch. However, even for timed turns, I actually prefer the digital EFT function on the Bendix King ADFs (if it is present).