After having full size tractor with loader I don't think I would ever be happy with one of those little ones. Just can't do enough with them according to what I am used to. Renting is a lot cheaper than buying for me. Kubota's are a nice unit and have a ton of nice attachments if one has the use for them.
I have 145hp tractors, and had a Cat 910 articulated wheel loader, and still have an old Hough loader with an 8' bucket. But this small Kubota gets where I can't with larger machines, and can do work without tearing up ground like a larger outfit. Every size machine has it's place to shine.