Have never tried Rowenta. I recently purchased an Oliso - the kind with the feet that raise and lower. Not sure what model ... 1600 perhaps (the yellow one). I don't use water in mine, but word of caution - mine says NOT to use distilled water so if that is what you usually use, DON'T with an Oliso.
Things I like about it ...
Really long cord
Great glide on the sole plate
Long auto shut off time (30 min I *think*)
Raise/lower feet (can be turned off)
Good weight (meaning heavy but not too heavy)
I've had mine for less than a year, so I can't vouch for longevity *yet*.
Sue