I have had a a cub cadet ZT1 46
Ultima. Bought it about 5 years ago. Been pleased with it. I mow 2.75 acres with a hilly terrian about once a week for 6 months of the year. Then mulch leaves maybe 3 time for a month, till I put it away for the winter. Overall it has been a good mower to me, though somehow the deck leveling nut, washer, and lock nut fell off after one season. Put a new one on and haven't had an issue since. I assume it's because the shop I bought it new from didn't get it locked down properly.
It feels cheaper than my old mower but... My old mower was a 22 year old Yazoo kees commerical grade mower. So my newer residential grade cub cadet isn't going to be as well built. The biggest thing I miss is going from a 48", 3 blade deck on the knees to the 46", 2 blade deck on the cub. Of course the 3 blades had a much better cut.
I didn't go commerical grade because of price. Looked around and the prices were making me feel like puking.