I quite like it, but you really need to get into it, in order to get some fun out of situations - if you watch it casually, it seems much less funny. (OK, I'm not saying it is particularly deep or anything

)
We're currently watching Season 8 (last but one), and I can say the best seasons were between 4-6 - those were the wildest. Roberts is great, no doubt, but Frank, the father, is the icing on the cake for me.
Also it helps when you recognize some of the characters in real life around you. I have a "virtual" friend from States who claims Marie is nothing compared to her mother-in-law. One of the her favourites was:
"teri, your mother has such beautiful skin. it is one of the advantages of being fat. you don't wrinkle so much"

fantastic. Can you imagine Marie saying that? Very easily.
PS. King Of Queens seems such average infantile-husband with wise-wife and pervert in-law sitcom. Carrie is not my favourite looks-wise. Just Shoot Me! had a great start, but getting rather bland as well (I'm on season 4). Likewise, Less Than Perfect (seen the first three seasons) started great, but lost it somewhere in Season 2.