I love my rangefinder, but in foggy or drizzly conditions it struggles (11 yards to a pin actually 135 away!)
I did toy with the idea of the gps version of my trolley, but decided it wasn't worth the extra £150. Plus, Bushnell have an GPS app for mobile, which you log onto using the serial number of your laser. Really rather handy, but I always forget I have it! 🙈
GPS is useful for unplayed courses and also helps with the carry distance and total distance calculations. I struggle to play with a watch on, so can't use those GPS types.
GM last month had a review of the Shot Scope Pro LX+ which gives you laser, GPS and stats in one product. £329. Also others on the market, like the Voice Caddie SL2.