What is your opinion of Square? I've seen the ads for it, but I'm
wanting to know if it is as straight forward as they make it sound?
Aside from the 2.75% per transaction fee, are there any other fees or
hurdles to use one? An end user perspective is what I'm interested in.
Thanks.

I use Square. Many local small business here use it. It's become
especially popular in our shopping streeet area around a major farmers
market. No other fees. I've been on both sides of the Square
transaction and love it.