M_Boats: Opening ports

Gail and I were hoping that we could get some input. What company, in your opinion makes the "best" opening ports for a sailboat? By best, I mean the best performer, toughest, most user friendly, best options and longest lasting. Thanx for any opinions. sal M15 - "Justus" - 1986 - #361 M23 - #2 - being built