FWIW, my experience with 2 2019-model Mule MX Pros. Mine was purchased this spring (on clearance sale), about 60 hours on it in 5 mos, mainly riding at ~20-25 kph (15 mph) on forest roads but some off-road too. My in-laws got theirs in 2019, but have a special use case where they drive mainly up and down one hill, summer and winter, and so are only 20 hrs in 1.5 years.
Both mules do what they're supposed to and we're happy with them. In particular, good towing ability in Low gear. And general good utility performance in a small-width 2-person form factor, which is what we need.
Here's the list of small problems encountered, for prospective purchasers to be aware.
1. On ours, 3 mos in, parking brake cable broke. No apparent reason. Warranty repair, no problems, but still.
2. On in-laws', they've been through 3 spark plugs by now. Not overly surprising given they use in 5-10 min increments and doesn't dry out. Just be aware if frequent short trips is your plan.
3. Finish is generally good, but door panels are cheap plastic with the green surface a cheap applied sticker on top. On ours, it's starting to peel off. No real problem, but really?
4. In-laws have the soft roof and side windows. Fit, air-tightness, and visibility is good, but you sort of have to snake your hand between door and side window from inside to outside to open the door using the only (outside) handle. Again, not a big deal, and wouldn't fuss about it with an after-market soft cab, but seems improvised for an OEM solution.
5. Front hood storage compartment stays shut with 2 cheap plastic knobs that don't look like they'll last long.
6. Nice to have dump bed, but the lift is fully manual, so don't expect to dump much!
7. Getting extra ignition keys is a hassle. Blanks not available in usual key duplicating places. Had to get from dealer, where it was expensive, had to be ordered from Kawi, and they sent only 1 not the 2 we ordered. Maybe people generally leave one key in the machine and one spare hidden away, but we prefer to have one set of "rural property keys" per person....
BTW, a 58" piece of PVC or ABS pipe, strapped horizontally or very slightly tilted on the outside of the back cab area at head height (so the dump bed clears) is a great way to carry a rake or shovel, which are otherwise just a smidgen too long to put in the cargo bed.
