Gnil if you have the opportunity to do it, do it. It is a marvellous experience.  Besides the  2.7 Carrera with the 911/83 engine is the last series production application of the mechanical fuel injection. This 911 will always represent a milestone in Porsche history .

With regards to the drawbacks, in my personal opinion  it is the driver`s effort. Those cars require permanent concentration as there are no safety nets; braking takes longer, the lift off oversteer is always a menace and you always really need to drive the car whether at 60 km/h or 180 km/h. On the wet you need to pay even more attention. Said that , this involvement, creates also amazing fun even at legal speeds . Yes safety is an issue as it is with any vintage car .  Furthemore in your country you have the perfect setting to enjoy a vintage 911 .