My biggest worry was not getting good coverage and this has NEVER been an issue.
I was looking for a cheaper alternative to Verizon ($85 monthly for 2 numbers and 2 GB on each, without hotspot capability). The same with US mobile would be about half. I chose to upgrade and have illimited data for 2 lines, one hotspot and I still pay LESS than what I was paying to Verizon.
I kicked myself to have stayed with Verizon for so long...