GPS 315
We have the 315 - which was similarly priced - it does all the basics very well, and is reasonably user friendly. Not fancy, but we didn't pay for fancy. Did notice it was a bit difficult to read when our eyeglasses were soaking wet from the squall that came through, but we couldn't see the front of the boat anyway...however, that little sucker saved our lives by guiding us into the harbor safely...[Carl says 'saved our lives' is a bit melodramatic, but since I have no trouble with heeling on sailboats, he'll let it go, gentleman that he is...!] BTW the 315 is waterproof - check if the 310 is - [would recommend a water-proof plastic bag if it isn't.....Jule & Carl DupreH340 s/v Syzygy