I'm not a huge fan of the web version on my iphone. I do like the app, but I honestly don't use it a whole lot. It's nice if I go out for a day to be able to still answer emails and convos, but it's pretty rare for me to be out that long..
Usually I just go to the gym, ship orders while I'm on that side of town, then go home and back to work..so unless it's super urgent, I usually just read it and reply when I get home.
So I really don't get a whole lot of use out of either the web version for smartphones, or the app..though I do love the cha-ching sound!!
As for contacting someone to give your opinion, I'm not sure. :S