I have an AR31 for about 6 weeks now and love it. My 31 set at 68 lbs has no hand shock at all and with aluminum arrows it is the quietest bow I have ever seen. It is not the fastest bow I own but it is by far the smoothest and quietest. My Mathews ultramax is faster but it is not as smooth or quiet and I only have factory installed string leeches on the AR31. I have limbsavers and a stabilizer ordered and I realy don' t know if I can improve it as nice as it is now.