I completely disagree. I flew the Twotter at Scenic Airlines a year and a half ago, got almost 500 hours in it. I hated that airplane. It's ugly, it's slow, it's underpowered...it could barely climb at 500 fpm up to 10,000ft with fuel and passengers, it's dangerous in icing, it's dangerous in strong winds.
You feel every single turbulent bump because it's such a pig. It's a pain in the ass to control on the ground during takeoff and landing. There is no autopilot. There is no lavatory. It's an all-around crappy airplane.
A Twin Otter is basically a mix between a King Air and a Caravan, with all the worst characteristics of each and none of the good.
It does everything mediocre. It's not good at anything, but since there's not much else available to fulfill it's role, it's the best of what's left.
The passenger seats are tiny, not even enough room for small asian women to sit comfortably. The luggage storage is virtually nonexistent. The only thing I liked about it was the roomy cockpit.