Hey,
I've got a DJM250MK2 since november 2017. I use it exclusively with 2 turntables (with rekordbox in dvs mode)
For the money I think you can't find a mixer with a better featureset (except if you want inbuilt-effects)
The lack of effects in dvs mode can be resolved with a midi-controller obviously.
You still have a decent filter per channel.
Can't say anything about durability, I used it exclusively at home (without any problems).
I have previous experience with traktor scratch dvs and can't find any faults in Rekordbox dvs.