I have a Freedompop S4 and love it, personally. But for a US only company it seems odd to get into the preposterously low end crap device space when options like the Nexus 7 or Shield tablet exist and are a magnitude better for what amounts to a small entry fee for most American consumers.
i bought my htc phone for freedompop on ebay for about $50.00 I love it. But I find it even better with a bluetooth ear piece. I also us in thru my car thru bluetooth. I was very supprose. It has some quarks. my monthy phone bill for them is I believe a 9 dollars per month. Still playing with it, not perfect but worth the cost.