I would love a quality wet food dispenser, but I have read all the reviews exhaustively and they are simply poor products and wet food does not lend itself to unattended feeding.
The primary issue is that wet food has a poor shelf life at room temperature, and a very specific window for it to dethaw to the right feeding temperature.
That limits you to quite specific calculation of when the food can be put in the automatic feeder, the ice packs in these autofeeders are generally very poor and I have yet to see a timed refrigerated one, and thawed wet food emits considerable aroma which will lure most cats to try and defeat the latch which most average intelligence cats seem to be able to do by either rotating or pulling up on the lid.
So for my wet feedings, there is no way around it I get myself a sitter to come by once a day.
But for their dry feedings, we're happy with this product:
http://www.amazon.com/Petmate-LeBistro-Portion-Control-Automatic/dp/B000TZ7022/ref=sr_1_1?ie=UTF8&qid=1323739521&sr=8-1
It works well with the Blue Wilderness sized square kibble. I am not sure how it works with differently shaped kibbles though. I did end up having to put a chopstick (as you can see a bit by buttercup's head) between the autofeeder and the attached bowl which prevents her from getting her paw up the latch. It holds exactly one of the largest bags of Blue Wilderness (12lbs IIRC) and is truly "set it and forget it". It feeds as little as 1/4 cup to I believe up to 2cups a feeding up to three times a day of varying meal sizes as you prefer. When on vacation, we have it feed breakfast and dinner, but otherwise its just once for dinner at 10PM. Once filled, it lasts us months unattended, and has a counter on it I reset whenever I wash the bowls. I did drill a small hole in the upper lip of the bowl though so that when placed upside down in the top rack of the dishwasher it drains the water out and comes out dry. Very happy overall. 
