Never one to jump in with both feet, I was a little sceptical when I first saw this but, comparing it's price with other simialr items and after reading the reviews, I decided to go ahead.
I used it for the first time on Sunday at a course I will be joining in the new year which is relatively unknown to me, having only played there about 4 or 5 times. Not having the steadiest of hands, I thought it might be a little difficult to get a reading on a 'limp' flag in the distance, but it couldn't have been easier.
Suffice to say, when faced with what I guessed was a 2nd shot of about 170 yards, I was shocked to find it was in reality 196! I changed club and left my shot 5 feet from the flag and got the birdie, as opposed to 20-odd feet short of the green, with a chance of a par.
As you can imagine, I am very, very, impressed with it's ease of use and accuracy and would recommend it to anybody