Looks like a really good app, and if I played more often (and seriously) I could well see myself getting. But for a hacker, like me, it'd be a bit overkill.

Note: I'm from the UK, so can only see the description in the UK app store (iOS).

Pro:

• Free app offers some very useful features, otherwise seen on very expensive tech
• Looks to cover many UK courses (40k worldwide) - can even be used as a way to find courses in your area
• Good app store reviews
• Apple watch app - which would perhaps be even more useful than iPhone app
• Great app for golf enthusiasts, giving valuable data to improve your game

Cons:

• Don't like to include this as a con, as app developers have to earn money, but some extra features are hidden behind a quite pricey Pro/Premium upgrade - @£6.99/month, or £39.99/year

Overall, looks very good and whilst Pro version is a little pricey, for their intended market, it's not too unreasonable a price to pay.