If a given area has a higher score than your handicap, then you're doing worse than you should be. Similarly, a lower score means you're doing better than your handicap indicates. This can really help you zero in on the areas that need attention.
The web-based dashboard (also available in the iOS app) has a ton of additional information: breakdowns of each round, number of shots with each club, variance from average yardage per club, greens hit in regulation with each club, etc. It's a data geek's dream.
During play, I found the Arccos system to be generally very accurate. When it wasn't, though, I found that manually editing a shot's location (fairway or rough) is harder than it should be. (The company has told me that this will be addressed in a future update.)
Because the sensors record impacts, if you tamp down repaired ball marks with your putter, you may find Arccos recording a lot of putts. Thankfully, it's pretty easy to delete extra shots.
My final concern is the 14 batteries for the sensors. According to Arccos, they should last 40 to 50 rounds--so if you play a lot, you'll be replacing them at least yearly. The iOS app tells you the state of each sensor's battery, so you won't be surprised when they die. (Still, I'd keep a few spares in the bag, just in case.)
At $300, the Arccos system isn't cheap. If you play only a few rounds a year, or don't care about your score, this is not for you. But if you play a lot and want to get better, it's a reasonable investment, given it should last for many years. (By way of comparison, a single round at Bandon Dunes--Oregon's golf mecca--will set you back $310, plus $100 for a caddie.)
I found the Arccos system easy to use--because it just works. Launch the app and play; it doesn't get much easier than that. The statistics are very useful for figuring out what areas of your game need attention, either through practice on your own or lessons.
Personally, I found it so useful that after returning the review unit, I bought one of my own. I guess that's a pretty strong recommendation, isn't it?
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