I’ve used Hologram & Twilio IoT and both are terrific. Hologram in particular has a fantastic interface (a little glossy for my tastes)
However, they can both get VERY expensive very quickly if you need 1GB or more per month - especially hologram.
I just ordered the 12 month 64Kbps unlimited sim from IoTdatawork (https://www.amazon.com/gp/product/B07JCTZ3BF) for only $40 which seems like an astonishing deal. I’m not expecting much on the signal quality side for some reason.
If you do the math, running at full speed of 64Kbps all the time means 5.5GBs (86400 seconds times 64Kb) per day of available traffic. Less than $4 for 150+ GB/month seems like a typo.