I also have Mint - it’s fine. I pay $66 for 3 months at a time of 15gb data per month. It’s a little annoying you have to buy in 3 month increments using the family plan discount, but still way better than the 2 year contracts of most providers. My service experience has been alright - every once in while it’ll be slow on me but that’s pretty rare. I’d cautiously recommend it if you’re looking to switch. Worst case scenario you’re only out a few dollars if you don’t buy the year long plan.