I've tried the smartphone based GolfLogix and it works fine. But I've just purchased a Nikon Riflehunter 550 6x21 rangefinder after studying the differences between the 550 and the Bushnell v2 Tour.
Reasons -- Foremost, because I work at a computer all day and I go to the golf course, in large part, to get away from work and "screens." Constantly handling the phone leaves me with a cold sense of never leaving the office because inevitably a text message will pop up or the phone will chime the arrival of an email.
Beyond that --
6x magnification in the Nikon vs 5x in the Tour
Nikon optics -- my oldest daughter and youngest son in law are both very successful professional photographers and Nikon is about all they use.
Finally, I am a recreational golfer and never have nor will entertain any thought of tournament play. The "tour certified" verbiage on the Bushnell or other golf specific units is not really a selling point for me.
As a contribution to the brain trust I'll do a review of the 550 after I've played a few rounds on my home course. I don't know all of the sprinkler head yardage markers by heart, but I do know their locations on the course. So I'll shoot an azimuth from the markers and make notes on the + or - factors of the distances.