I got a Callaway Micro a few years ago when our club had a sale on them. Saw a friend with one and really like the small size and prism technology, since our course has prisms. And with its LCD readout, It is so much easier than having to put something up to my eye. I just point and shoot - literally.
However, at longer distances (200+) at a course without prisms - its difficult to lock in. It has a 'pin' mode, but can still be difficult at distance.
Oh, and it works overseas too - JimEng managed to put it into Meters mode and it took us quite a while to figure out how to get it back to Yards. This incident may have been alcohol influenced.
I'd give MG Golf a shot though, their gloves are top notch and I've heard the balls are too.