I've got the tst 510 sensors and have used them on two different coaches. On my shorter previous coach I got by with just the short antenna and could read all 6 of the coach tires and the 4 toad tires. On this longer coach I have to use the larger dipole antenna to read all of the sensors. I don't need the booster.
You may not need the booster. I mounted my dipole antenna near the top center of the windshield.
For over 4 years, the system has worked well and gives me comfort in knowing that I don't have a slow leak that may ultimately end with a blowout.