I have a pair of them still running strong. I really like them for OP.
I just bought two new Multisprayers for WDR, and replaced a couple of old ones were starting to look like dogs.
They still run fine but the plastic is marred and beat up, bent spray wands. Just ugly. We'll use them here in the shop and they can be back up. While I love the big boss, the tech's like the smaller Multisprayers with less weight and size.
The Big Boss does work well for large areas, especially commercial.