I have an Eastman 505 - really nice mandolin for the price! Hand carved, all solid woods, radiused ebony fretboard, ebony bridge and cast one-piece tailpiece, plus a nitro finish. AND a fitted case. What's not to like?!
PS Also tried out a 305, which was also very nice, but figured it was well worth the extra money for better upgrades (better tuners, bridge, fretboard and tailpiece on the 505).
PPS Realise you bought a 515 not a 505 but all the other info about fit and finish still holds true.