I have used a couple of PyCom products, including the FiPy. In general, it’s a great experience if you’re using it how they recommend. The MicroPython code makes for very succinct startup code. The pitfalls appear when things go wrong. Getting under the hood was very difficult and it made me dependent upon the grace of their developers who hung out on the forums. I’m sure the software has improved in the two years since I last used those devices.
Another thing of note is that while the code is relatively easy, the power requirements are pretty high. This is due to having a cellular modem onboard and them using the ESP32 chipset, which at the time I was using it had very poor power management.