I know it always used to be the case that going off-brand on tablets was basically a waste of money, but I've been seeing lots of reviews of the Huion range of tablets that are very positive. Main gripes are:
Pen requires a battery (believe wacom have a patent on the wireless power for pen bit)
Surfaces are very smooth/slick when compared to the more paper-y texture of the Wacoms
Drivers can be fiddly to install, and not as customisable as the wacom ones.
Anyone used one? It's very tempting, when a large format one (10" x 6.25") new is about the same as an intuos pen small.
http://www.ebay.co.uk/itm/Huion-H610Pro-5080-LPI-10x6-25-Professional-Art-Graphics-Drawing-Tablet-/332020803090?hash=item4d4dfb6612:g:gQMAAOSwZ1BXemoT