Yes I`ve got a little Neuson duckling the older cousin to the Wacker Neuson EW65.
I have changed the tyres from the OE type which where similar to big skid steer tyres, pneumatic but very solid and square on the shoulder to a floatation type, its lost a little stability, and bounces slightly more on the road, but is a lot better if you have to go on grass (doesn't cut on the shoulder) or softer ground, definitely not a tracked replacement!
Roading is OK, but don't expect to rush anywhere, we`re in quite a hilly area, the backhoe was better for traveling. Storage is a bit of a problem if its the only vehicle going to a job, there's not a lot of room in the cab for your flask, butties, and coat, differently needs a blade tray for your buckets. With a little thought some clips and brackets on top of the undercarriage for your brush and shovel, small items like marker spray, chains, tools, etc go in the boxes behind the steps.
One problem with all (most?) ducks is the permanent 4x4, being able to disconnect it would have to improve the road travel/wear/damage, it had crossed my mind to axle lock it on 3 wheels to release some of the wind up
It will work comfortably in a single lane closure, or single track lane cross carriage, with the axle lock on, FoW stability hasn't been a problem.
The higher cab vs tracked machine is great for visibility especially loading or digging out the back of trucks, but access can become a pain if your in and out a lot, loading and driving the dumper for example, also off road crossing banks etc can make you twitch
