The Vantage select allows you to change sensitivity on the fly and to change mode from proporational to Full. I must say, I played with it when it was new, but once I got a good setting I never change it. If I bought again, I would save the money and go with the cheaper Classic.
I've towed my Toad all over the west in the mountains, on the flat lands., In small towns, on the freeways, and in the big southern CA cities. Once I figured out the best setting for sensitivity I leave the BB at that setting and it works as advertised.
The best feature on teh Vantage is the fact you know when the brake is applied and you know when there is a problem with the BB, or when the battery is weak in the remote. The Classic may have this same capabilty.
THe only issue I've ever had is the RF communications get screwed up when I use the 12 VDC adapter. THe link becomes erratic and the remote fails to show the brakes are applied. THerefore I never use the 12V DC adapter, I only use the internal AA cell batteries and one set has lasted for several months. Besides, no power cable to worry about and as stated, the batteries last forever.
Roadking - Homeless, full time, wandering gypsies
Winnebago Ultimate Advantage
Harley and Honda Civic