Our 5'6" daughter's LHT is a 50 cm, and it seems to fit her well. Her legs are a little on the long side in proportion to her torso. The standover height is good, but not excessive. We seemed to have obtained a pretty good fit, and she has put in some long miles with no complaints. She has been running 26" x 1.25 tires for touring.
However, it is not a stock bike. The drive train is a 9 spd. 44/32/22 crankset with an 11-34 rear cassette.
Tell the shop not to cut your steerer tube. Depending on where you dial in your bar height, you may not even want/need to have it cut. I still have not got around to cutting the one on my LHT It has only been 4 years since I finished putting it together
Bar height/stem size adjusted for a lillte more upright riding position.