I have a Rowenta and I do not like it, it does not get hot enough and the auto shut off causes me to have to wait so long for it to re-heat itself in between sewing time. I like my cheap Panasonic that I bought years ago in a Target store. It has the auto shut off but heats up real fast so that is not a problem for me. In fact I'm kinda glad it does because sometimes you get interrupted and forget to go back and turn it off.
I have a question though, can you run a vinegar solution through your iron periodically to remove the build-up of calcium, etc. like you do your coffee pot as long as you run a few refills of clear water through it afterward?