I have bought expensive and cheap irons and I do not notice a difference. The steam is still contrary and only comes out when it wants to - usually when I stand it upright again after pressing something
As for ironing towels? Well I find that when I have finished ironing all my lingerie, socks, nylons, my husbands 'smalls' and socks, all my table cloths and napkins and the drapes well I just don't have the time to worry about towels, or shirts or bed linen or .....please feel free to add something yourself
When I bought my latest travel iron my sons only comment was "for somebody who doesn't iron anything you sure buy a lot of irons"!