I used mono tubes for about 75,000 miles, yes when they were new the ride was slightly improved, mine came with a lifetime warranty, the little gas filled shocks eventually leaked and they would bottom out on anything more than a regular bump in the road. Contacted Progressive and they authorized shipping to them for inspection along with the original sales receipt , took about 6 weeks to get back a brandnew set of mono tubes, obviously I wasn’t happy waiting 6 weeks for something so simple so went back to stock and never re installed the mono tubes. Someone on the board contacted me about buying them and I happily sold them and have never missed them.
Boomer if you really want an improved ride I highly recommend taking a test ride on a 2018-2019, the new front end is very impressive, unbelievably smooth !