I bought a BX2680 in March 2019 and have had nothing but problems since.
The quick disconnect hydraulic on the bucket started leaking almost immediately. It seems it's a common problem. That was fixed. The throttle and 4x4 knobs just fell off. The hydraulic lift keeps popping out of float mode. The hydro static drive won't disengage causing it to keep rolling backwards. The 4x4 is almost impossible to disengage. The mower doesn't mow well, and bagging system sort of works. The power take-off lever keeps popping out and disengaging. The lift levers for the deck just fall off.
Do yourself a favor, skip Kubota!