Posh is always an interesting browse. Most of the pieces (yes, I'm calling them pieces) are $50+, with many separates around the $100 mark, as I recall. I'd suggest it for upscale casual wear, funky office wear, and glittering tea gowns.
She keeps a decent range of sizes, though one might not have much selection over a 14.
The clientele isn't easily pigeonholed (except by pocketbook); my mom and I both shop here. Most recently, I brought a friend here to look for a dress for her wedding, and she found one that might, funnily enough, trump everything we saw on the Danforth.