i have a Milwaukee ph51 that i like very much. the first one i bought took a shit on me about a week into using it, manufacturing mistake i believe. i got a new one for free and its worked great ever since. been using it for a couple weeks and have only had to calibrate it once.... out of the package
I have the PH600 and it has worked fine for me for a couple months so far, I did drop it in some tap water, had to open the end and dry it out...glad it survived. Bill