I don't use it but I have heard both good things and bad things about it. One of the big limitations is the fact they use ngspice for their simulation and many

I don't use it but I have heard both good things and bad things about it. One of the big limitations is the fact they use ngspice for their simulation and many models are encrypted. So lots of folks use it as a frontend for ltspice. TL;DR, it can be challenging, but there is support for it.