In my search for a laser distance measuring device, I came across a fairly used Disto Pro 4a for less than two hundred dollars. Be4 now all I've been seeing and reading about are the As and Ds classification. Since I joined this forum I have been impressed by the amount of wisdom, experience, candor and willingness to share information displayed by members at all levels. With this kind of resource at ones disposal, a newbie like me should not make the mistake of taking a plunge without contacting you guys (that is my opinion; YMMV). So I ask a) has anybody had experience with this instrument? b) what can you tell a potential buyer? Thanks.