I went ahead and splurged on the pro model - - it has two different heads and 3 different levels of steam, and even has an on/off switch.
I used it yesterday for about 10 minutes. I was not impressed. I did one area of my kitchen linoleum and it didn't look much different from when I do it with my swiffer wetjet. I didn't even show DH because I didn't want him to give me crap about spending money on something that didn't work.

I'll definitely give it another try when I have more time to devote to it.