That three-piece is kinda cool...but I actually still prefer the one I had in my last 60 gallon setup which we bought at Petsmart:
Top Fin® Schooner Bow with Fabric Sail - Decorations - Fish - PetSmart
We were doing the whole pirate/shipwreck theme back then, and this was the centerpiece...even if you don't get another piece to make a fully "cracked ship," this one piece looks pretty authentic under the water. The only thing that sucked about it were the white silk sails -- these things got LOADED and killed with brown diatom algae in our tank, in addition to green algae which eventually took over. The sails looked DISGUSTING just before we experienced a bacterial infection in that tank that killed all our fancy goldfish and required us to throw all the decor, gravel and plants away.
Still, this was a cool decoration -- the fish were constantly going in and out of the hole in the bottom of the ship (I believe you can hook up an airline to this piece so the ship bubbles; we didn't) and exploring the upper deck portion to hunt for food. I would love to do the whole "shipwreck" theme again, as I think it's the most authentic underwater scape next to the natural/driftwood theme, but we already have stuff for a natural-Asian hybrid theme for the next time we set up a goldfish tank...