Really love how inclusive ASOS is becoming, especially the Modest line and fuller bust, but would love it if they would add a petite section for them. The price isn't always the best but the quality is great so it makes up for it.
Also normally runs a little big I find, but having done quite a few returns, I guess the ASOS algorithm has figured out my size and recommends a good size for me.
Lastly, I normally use standard delivery but get it really fast (2 days later), and the returns process I find is very easy compared to other websites.