I've seen other people recommend that seller, so you're probably safe with them. China based sellers often have smaller wig caps though, so if you have a big head, especially over 23" around at the hairline, you're better off with a US seller particularly the one LittleKagsin mentioned.
See me at Vancouver's own Anime Revolution in August 2012!
See me there as Lumpy Space Princess.
Princess Bubblegum-Adventure Time
The Flower Card-Cardcaptor Sakura
Rika Furude(school outfit)-Higurashi No Naku Koro Ni