I used to use Mint Mobile, maybe about 6 or 7 years ago. The price can't be beat, but I found the cell service to be sub-par. I'd often have people tell me they tried to call me and the call wouldn't go through or text me and I never would receive the text. One time I didn't get an important call, and I immediately unsubscribed. This is when I was living in NYC, so I wasn't out in the boonies. Maybe it's better now, but I can't trust them.
Right now, I'm on Google Fi and I have been since I dropped Mint. Google Fi is totally fine for me - I don't use much data so my phone bill is rarely higher than $35/month. I don't have any issues with anyone being able to reach me.
I would say go for it and give it a shot for a month or two. A nice thing about these MVNOs is they have little to no contract obligations, so you can hop around to find what works best for you.