I have sailed a 37 foot Nauticat with a bow-thruster. In big currents and cross winds in tight quarters going stern-to, it was a god-send.
I also teach power boating. With the massive windage that some have, the bow-thruster is almost mandatory. A single screw trawler makes both bow and stern thrusters very nice luxuries.
ISPA Yachtmaster Offshore Instructor Evaluator
Sail Canada Advanced Cruising Instructor
IYT Yachtmaster Coastal Instructor
As I sail, I praise God, and care not. (Luke Foxe)