First off, splitboards are super reliable and perform just like a solid. Way better choice for the cost.
But, if you are just going out and building a kicker a mile or so from the trail head, these don't seem like a bad way to go. Admittedly I have never done a full jump session with a split but pucks do break on occasion. More so than with a solid set up. For launching off of cliffs and such, splits are fine.
If you are planning on doing real tours, get a split. You won't carry as much weight and carrying your on your back sucks. It's a wind sail, it's heavy, and it gets stuck in tree branches and other tight spots.
The biggest problem with Mtn Approach is the cost. You can get a full kit factory split for the cost of the Mtn Approach system. If they could halve the price, you might have something there.