I'd offer alternatives, such as free widgets, but let them know that Web.com has minimal problems and works hard to keep everything updated and fresh.
I used Web.com for the convenience and easy building tools. I didn't note many noticeable problems, other than having to pay for widgets, but that's relatively new. I love its easy website building, photos, descriptions, and font colors. I'd say it's pretty good, other than what I mentioned beforehand about having to pay for widgets.
The easy to use tools and fonts.
Nothing in particular. It's a little bit difficult to move photos around, but other than that, nothing.