I use Blue Beacon, they sure beat doing it yourself when on the road. Having said that, it probably won't be the same as the one you paid more money for.
I would pay the little extra for the Rain-X coating and I would pay extra for a hand dry job if they do, not all of them do, but ask. Otherwise you could wind up with some streaks. Wheel polishing is extra if you have chrome wheels.
Generally after the wash you'll pull it out front where they do the hand drying (if they do it) and you can look at it to see if they missed any places. By having them hand dry it, they catch any places they missed with the brushes.
Bill