OK I took the Ace350 out for about 11/2 Hrs. So far it has measured up equal to my CMP. here are a few things I am not to satisfied with. 1. the screen is at an angle witch is hard to see 2. the shaft seems to wobbly. and some time the pin point works sometime it is just a low grunting sound. and it is a little erratic, Maybe due to a lot of trash or the Battery was on only on 2 bars. But every machine has a learning curve, Especially when you are used to another machine.One more thing the arm cup is to short, only hits you half way to the elbow. I know they sell a extent ion, But for what you pay for this machine you shouldn't have to spend extra money for a design flaw.