Innovative and shallow-draft underwater hull form, combined with long waterline length, narrow beam and minimal superstructure. Easily-propelled vessel which allow smaller main engines and fuel economies etc. What's to complain about?
1) Poor/unimaginative superstructure styling (easily corrected though).
2) Marina berths will cost as much if not more than for a typical "heavy dispacement" yacht. This type of yacht will have a more important length/beam ratio, unfortunetly most marinas base their fees on the overall length of the yacht, so far as I'm lead to believe.