I took a short ride for exercise this morning, covering 31 km in 54 minutes with the velomobile, including traffic lights, negotiating other road users etc.
The Mango is far from the quickest velomobile available nowadays, and mine is fitted with slower puncture proof "winter" tyres because I really don't like fixing punctures in the rain, but for the same expended effort it still consistently goes about 15-20% faster than my road/racing bike or my two wheeled recumbent, a touring model which is a little slower than the road bike.
Add in the low maintenance (leading to low running costs), the weather protection and three wheels making winter cycling much safer and there's so much to like. This is the most efficient transport mode in existence and it's also very practical. It's also fun, of course.