I just got my second pair of glasses from Mega Save and it was another pleasant experience. They have an excellent selection of frames, without being overwhelming. They also have very reasonable prices on designer frames and a really handy section with budget frames (I think it's about $45 for the lens and frame combo from that section).
Anyhow - i found a pair of glasses I love, he made them for me in half an hour and made sure they fit well. I'm not sure what else I could possibly need from a glasses store!