Picked up a used Waterloo WL-K earlier today. I recently sold a Martin Custom Shop OM-15 and was just going to go with one acoustic for a while (my D-18), but that only lasted a couple days. This little gem crossed my path for an incredible price (was part of an estate sale where a guy bought an entire lot of guitars from a man who recently passed away and is selling them off individually). I've owned a couple WL-14's in the past and this WL-K is definitely a different animal. Because of the light build Waterloo emphasizes to use nothing heavier than 11-52's on it. I swear the strings on the guitar are the originals and they are beyond dead, but the guitar still sounds wonderful. Have some D'Addario EJ26's on the way from Sweetwater. It's an insanely light guitar, has a t-bar (no trussed) and set up is just like the two other Waterloos' Iv'e owned in the past, so the playability is wonderful. It's a very lively guitar, but still emphasizes the fundamental and doesn't have a ton of overtones or complexity like a small body Martin does. It has a very old-timey sound. It's a couch picker's dream. I play a lot of cross picking and flat picking on the D-18, but also do a lot of fingerpicking, and the WL-K just seems to be made for that. Love playing and singing stuff from Wilco, Gregory Alan Isakov, John Hartford, etc. and this is the perfect little guitar for singer/songwriter stuff.