I bought the Isabella's Kitchen pork tamales - 10 pack, fresh (not frozen) - at Costco for $13.49. We had them for part of dinner tonight. We steamed them in the bamboo steamer (we don't have a tamalera) - they are huge, barely managed to fit 5 in one tray.
I thought that the flavor was excellent and the overall texture quite good. I'm sure they don't compare to home-made, but for the money, they make a cheap, decent quick dinner for those busy nights.
One thing I missed was a good sauce. I ate it with some picco de gallo and some hot sauce (had both El Yucateco and Chalula) but I should have made or bought me a good enchilada sauce or maybe even a mole poblano. Not that the tamale was dry - just needed something to ride over the corn. I know some folks even like chili on tamales - I'm not a big fan of the standard ground beef chili with tamales, but I do like a spicy chili verde - but if I'm going to take the time to make that, I don't need to buy a bag of tamales.