Things may have improved, but six years ago I got a Wilson antenna and booster for the MH. The booster did nothing so I sent it back.
The antenna did give me one extra bar on the cell phone. The problem there was I had to have an external antenna direct plug in for the cell phone to gain that extra bar. Without a cell phone that had a direct plug in, I got no gain at all.
Looks like your setup is a much improved version and may have better luck. Make sure you can return the product if you run into issues like I had back in the day.