I agree with the general concensus...the only way that Sketchers and Doc Martens compare is in looks, quality wise the Docs are simply a much better product...and this is from someone who used to only buy Sketchers because they were half the price, my fiancee convinced me to try some Docs and that was the end of the story.
The only negative is that they only come in full sizes which means if you are an odd size like I am you are pretty screwed. Because of this my next shoes will be either Johnson and Murphys or some Rockports...try to get anything on a deal, if there is a shoe wearhouse store or something near you that is best.
they are nice, and imho they are well worth the money, remember you only get one pair of feet so treat them well 🙂 (same can be said for anything that you wear)