I have one of those very expensive laurastar iron+ironing board; my wife bought it for me as a present (!) since I like to iron my own shirts.
Without a rowenta to compare against - only a previous panasonic steam iron and others equivalent and also a standalone steamer, I'd have to say the laurastar makes it MUCH easier to iron my shirts; in the tropical climate that I live in, previous steam irons would not do a good job (after a few minutes of hanging, my shirts would show some wrinkles again, I guess because it's so humid), but the laurastar does do so (hotter steam? the salesman said "dry" steam, whatever that means!), with plenty of steam; lasts me about 4-5 shirts before I have to refill it again.
Don't know about long term reliability, although the salesman had been using the same demo iron+board for the last 2 years (or so he says!) and he showed me the stains etc that would happen if you don't decouple the iron from the silicon (?) base that it sits in when ironing, and also the ironing board cover from the board itself - since he demos for 3-4 hours at a time without doing so.