I knew when I bought this that it was on the 'low end'. My main reason for buying this was to use as a guage for my son when he was doing his pitching workouts. When I'm right there behind him the gun works flawlessly. When I tried to use it at a recent game, I couldn;t get a reading. The team's gun worked fine (about $800 I was told) but not mine. I tried from the seats right behind home plate and even went right up to the fence; still nothing. The unit is supposed to pick up a baseball from 90-100 feet, but I think the fence maybe added a bit of interference.
Anyway, Like I said, I knew up front that this gun was going to be used mainly as a training tool, and for that, it works just fine.
Pros: price, price, price
Cons: you get what you pay for
This review was written in the old system and had content requirements that are different than reviews written today.