I don't like Factorization as a whole and last time I saw the Exosuit in Etho's videos it was very buggy. The features it has also aren't bad, but I can easily do without them. I mean pushing blocks sounds like fun, but what's the point? Safely building a bridge? Who cares when you can have a suit that protects you from everything and allows you to fly as well...
I have tried the modular power suits though and I absolutely love them. They don't have many bugs (not to the point they're unusable at least) and new features are added every patch. I also like how they can transition from relatively early game armor to horribly OP late game armor.