I'd love to get my hands on one of these types of square balers. Don't take up as much space in a barn, and I've heard they were a little easier on the tractor running them.
I'm very pleased with it. Storage space requirements are limited which is a plus I never really thought about. We use whatever tractor that isn't busy on it but all have 80ish HP or more so HP is never a concern. Does seem to not surge tractor as much when the plunger hits like a conventional baler.