3 different product: 1 vac, 1 shampoo, 1 frag. There are only 2 hose hooks and it seems like they might breeed frustration for the customer. Easy enough to add another hook I guess.
Tangling is pretty minimal, most is limited to the shampoo/fragrance hoses. I occasionally find them twisted together, but most people just hang the tool on the hook and leave the hose on the ground which isn't a problem.
I have a JE Adams 6 in 1 that has four product hoses. The customers love it, but like MEP the hoses usually don't get put back up. Its just to difficult for the customer to waste their time with. I just put them back up every time I walk by.