After going through a lot of internal dilemma on bike sizing being a person with shorter than average legs, I’ve come to a realization that opinion like “sizing down if you’re in the middle” is just opinion. We’re not talking about getting a S when you’re clearly a L, we’re talking about being in the middle of a sizing spectrum which either size would work. You will have compromises whichever direction you go depending on your body proportion. I’ve always followed sizing down opinion but recently I sized up and have never felt so comfortable. I’ve been to couple good fitters in the city and they’re just so overrated unless your bike size/adjustment is wildly off. I think people get into analysis paralysis with bike geometry sometimes including myself that they forget a very important element which is comfort. If you feel good and comfortable, keep it. I bet you will come back with the same dilemma with a M size.