This is my second pair of Monty Lo's. I own four pairs of Ridgemont shoes — two Monty Lo's and two Outback II's — and they are some of the most comfortable shoes I have owned or currently own. On the sizing, I have tried both 11.5 and 12 sizes, and they have fit just fine. I typically wear either size, depending on the shoe manufacturer; for example, I wear a 11.5 in Vans shoes. So, sizing probably depends more on whether you have a narrow or wide foot. Regardless, these are some great shows and I highly recommend them!