Am a proud member of the type II club. Learning the whole U-boat business in one of those is like learning to drive in a 500cc Fiat - there's no room for mistakes when you're trying to overtake in one of those.
With so few eels, no deck gun and such low speeds you need to get everything just right to get any results. If and when I ever get enough renown to trade up to the Ferrari-like heights of a VII it will really feel like I've earnt it.