I just got a Beta Master Chrony this past summer and have had no problems with it whatsoever. The Master version puts the electronics on your bench, so they are easier to read, reset, etc and you also won't shoot them!! I've used it for my bow and rifle and it has worked fine. For $99 or so, I don't know if you can beat it (MidSouth Shooter's Supply).
This one does all of the SD, AVE, High, low, etc calcs for you, as well.
... Crayfish