they arent anywhere near the quality (or price) of the italian ones but i've got a couple of the keg king ones and they seem fine for the amount that i use them
there's a lip at the bottom that people are worried about shit hiding in which is a fair call, the other problems are fairly minor
i dont store beer in mine long term and only use them for parties etc or as a dregs keg so they never really have beer in them for more than a few days
if you are thinking of using them to store smaller batches in long term or use them all the time then definately go with the italian ones