I have a Rowenta and Oliso Pro at home, my Rowenta leaks but I love the weight of it, the Oliso hasn't had any problems yet. I've read a lot of reviews and it seems like 2-3% of irons fail, of every brand. It's just a lot more disappointing when it's a $150 Rowenta/Oliso versus a $30 B&D...
I imagine they fail because there's a lot of wattage going through the device so any tiny imperfections in the engineering will easily cause a failure.
In terms of warranties, we cover the manufacturers warranties with repairs or replacements if you experience any problems.
The iTouch for the Oliso PRO takes a while to get used to, but is cool once you get the hang of it. Also the 30 minute auto-shut-off is really handy!