Tow Haul button on Ford F-53 chassis

I have a 2008 Monaco Monarch with the ford chassis and tow/haul mode in the tranny. I just returned from a trip to the CA coast which requires navigating some windy roads. Someone mentioned keeping the trans in tow/haul at all times. I think that is bad advice. But I use it a lot. As I approach windy roads where I need to slow down, I back off the accelerator and hit the tow/haul button. As I need to slow down further, I tap my brake pedal and it will down shift the tranny as needed to the desired speed. If I need to come to a stop and am staying on the brake pedal, the tranny will downshift further to help me stop. I have also found that if is helpful in stop n go traffic to use it to save my brakes. I have used this mode in the sierras on some significant downgrades (8%) as well. It is a great tool. I read on one of the forums someone posted that they are able to never touch their brakes when using this mode. I think that is baloney. The mode actually uses the brake system to computer your downshifting, so braking is an important part of the system, it just allows you to not "ride" your brake when going downhill.