I stream from www.anilinkz.com using the 4up mirror (360p) since I can stream it without buffering that way. You can also direct download the video from using 4up mirror.
I've never had any real problems and i'm using ipad.
Well, except that i never found a link for katanagatari ep 2
Still though, there are loads of sites whether you torrent or stream.
Brendan (he who passeth judgement on the frequent changing of signatures): I don't do hentai anymore