Hi there,
I just bought a 2007 Vitality 50, 4T, as my first scooter. The next day, I joined The Ottawa Valley Scooter club and did a 120 KM ride around the Gatineau national park, WITH my girlfriend in the back, up and down hills. It was great. We were 9 scooters, and most had Vespas, but we were able to keep up. We struggled through steep hills, but that's because we were 2 on it. Generally speaking, 4T are slower than 2T, and 50cc are about as slow as they come, so a 50cc 4T is the slowest thing on the streets (but hey, we can always laugh at the electric scooters...). With that said, a 50cc Vitality will let you roam safely through traffic, pick up 70 KM / hour, even with someone in the back, and have no problem starting up the hill. The kymco seems great so far, the price and build quality are great. Overall, I don't regret the purchase at all. ( I paid 1100 CAD for it, and the original receipt shows total price 3000$ (including tax)).
Good ridin'!