Inspired by the MMM post on FreedomPop, we recently decided to give it a try for our home internet use. We signed up for their mid-range plan ($15/month + ~$100 for their 'hub burst'), as it seemed to have speeds comparable to our AT&T plan ($30/month, and slated to go up to $41/month after the first year).
Our results: According to their map, our address has very high 4G coverage. However, the hub burst on its own had a very hard time getting a consistent connection. Internet was constantly going out. Super frustrating. We emailed their support and heard back a few days later. They recommended an external antenna, which we found for $24 on Amazon. The antenna has totally fixed us up, we now get consistent access at a pretty decent speed. We are going through our free data verrrry slowly, so I suspect that most months we will pay just the $15, very nice!
I should note that we do not have hulu, netflix, etc. and so we rarely (if ever) want to stream anything. We mostly use the internet for email, a little browsing, stuff like that.
So, conclusion: If you, like us, are a minimalist internet user, I would totally recommend FreedomPop, BUT....I would definitely plan on also having to get/make an antenna.