Six seats, 150+kts, job done.
Yes, in the hands of an experienced pilot. At 150 knots, things happen fast for a new pilot, and those other five people can be very distracting. As new pilots practice longer flights in less demanding circumstances, the basic skills will develop and the demands of flying the plane will take less of the total available attention of the pilot, allowing that pilot to divert the needed attention to passengers, new geographical areas, and then the abnormal situation which occurs from time to time.
I can remember one of my first flights flying the Cessna 310 with four passengers, husband, wife, daughter and friend. Conditions were ideal for the flight. At 180 knots, things happened faster than I expected and (long before the days of GPS) I arrived much sooner than I expected to my destination, so there I was at 6500 feet, doing 180 knots, entering the control zone - I errantly left myself a lot of getting down to do! - My poor planning. So, my descent was a bit more rapid than I should have undertaken. I was okay with it, and husband toughed it out, but the 500+FPM descent (entirely my fault to need to do) was misery for the three ladies in the back. There were "ows" and tears from ears popping, and the sense of speed. It was no bug deal for an experienced aviator, but I had overlooked the fact that not everyone who boards your aircraft is as experienced as they, or you think. Ultimately, no harm done, but I felt unprofessional. The passengers distracted me terribly on the way down, while I reminded myself to focus on arrival checklists. It was the entry point to a stupid accident. I prevented the stupid accident with nearly adequate airmanship, and the whole event was very memorable for me.
Walk before you run....