To be clear, here are the reasons I would not own one of those, although there are MANY things VERY attractive about them (and the bigger models).
1) Way, way WAY too much
power. Remember that every 20 HP in
diesel burns a gallon per hour. So 400 HP is 20 gallons per hour. And sorry to burst the bubble, but high speed hulls are horribly inefficient at low speeds: easily twice the fuel burn at cruising speed as a proper displacement
hull. High speed engines are also horrible at low speeds. I'm not at all surprised that Power and
Motoryacht (
Boat Test: Beneteau Swift Trawler 34 - Power & Motoryacht - Beneteau Swift Trawler 34 ) found the fuel
consumption to be "dismal."
2) Engine under
cabin: very noisy underway, bad access, results in breakdowns and smells.
3) Way, way, WAY too many
parts that are not glassed down. All that stick-built
interior starts out rattling at the
dock, will get worse and worse over time at sea.
4) Way way WAY too much stuff for the given amount of area and volume. Two staterooms? You really want it open, not claustrophobic as nearly every production boat.
The root problem is that the boat is designed more to be
sold than to be used. This is a very common problem with production boats, and the reason so many people have that
classic experience of "the two happiest days: the day the buy it, and the day they sell it."
If instead the boat is appropriate for the way it is actually used, then pleasure comes as you use it. That's why it's called "pleasure boating" after all!