Most of their clothes are pretty decent quality. Style wise they have a mix - some lovely classic things especially for work, and a few things that are frumptastic but you will spot them a mile off. I have several things from there and they tend to be quite durable.
Sizing - try stuff on, I have dresses in a 10,12 and 14 when I am normally a 14.
I did a market research thing for them a few weeks ago and they have some nice things in just now - some lovely coats and nice winter things. Also a few nice things in the NW3 range imo. I think their website undersells some of their clothes by not showing them on people!
I have got... (for 20% off) a stripy knitted top a cream and black square-spotted blouse with black pussy bow grey cigarette pants (nw3) plum jeans a blue patterned silk dress, elastic same fabric belt.
and I have a 15% voucher for that store lasting a year, and a goody bag with bottle of cava and a cute little ponyskin card wallet.