Some time ago I was considering of getting Phase Change. But honestly, it's not enough for real hardcore benching since the lowest temp you can achieve is like -40C.
Technically you can chain few phase change compressors to build cascade. If filled with proper gas, you can get below -100C, but it would be very hard and expensive to build and would be a very massive thing.
PS
Hey Sola, haven't heard from you for a while, how are you, my friend?