The guitar has a good weight to it, the finish is really well done, the neck does take a while to get used to, because it is a V shaped neck, actually kind of a deep V, you can actually feel the edge when picking it up. The Adirondack top is superb, I do not know what happened to the wood in 30 years, but I guess the global warming had something to do with it, because it sounds a lot more older and dried out. The back and sides mahogany is a another really good choice, the wood is really well selected. I had the luck to receive one from a batch that actually has a flamed mahogany look to it, which is quite rare. The guitar feels so balanced, the highs are crisp and the lows are well defined. It immediately became a favourite in my collection (Martins, Freshmans, Taylors), no doubt. I highly recommend buying one, even if not tried before. This was my case anyway, it was a blind buy, especially because of the Adirondack 30 years old top and it was totally worth it.
Bonus: I actually own another RK guitar, the RD-T16 which is another good instrument, has Adirondack torrefied top with laminated mahogany back and sides. You can immediately sense the difference between them, the RD-T16 feels drier and uncompressed and unbalanced, has a more vintage vibe to it, and the harmonics aren't really there. It can be a little loud sometimes as well. You would expect them to sound close to each other but really there are major differences. So, if you are undecided between the two, pick the RD-318, the price/quality ratio is definitely in your favour! Cheers