I've had the Hap for a while now and I must say that I'm quite happy with it overall. Good intuitive interface, useless remote, but easy enough to work from my dedicated iPad. (Which was on its way to the graveyard before I got into streaming/servers.) It survives as my remote for the Hap.
I've loaded approximately 200GB thus far with a lot of room to spare. I wish it would allow me to consolidate files via the computer interface; Artists that record singles with other artists cannot be consolidated into a folder. Small kvetch. It's a keeper.