Fantastically stable - can walk around on the gunwales.
Happily takes 15hp
motor, but be aware of potential for prop cavitation (ventilation). A large whale-tail almost fixes this.
Very nearly indestructible, and puncture proof. Spearfishing sharp points are a non-event, as are oysters against the wharf.
Hatches are a great feature for
storage.
Because PE bounces off so well, bumping against your aloooominum mother ship (or other f/glass) is no big deal.
No sharp corners to injure you.
Easy to get into, from the
water.
BUT
Very heavy.
Due to weight and friction of PE on sand, very difficult to pull up the beach out of the
water. Also very (very!) difficult to pull back into the water when the tide has gone out.
Wheels difficult or impossible to bolt on the transom, cos of the steps. Your welding skills might be able to fabricate something suitable. I used 4 x 1m lengths of 100mm poly pipe as skids or "wheels".
It tends to be a "wet"
boat. The blunt bow pushes up spray, which then blows back over the occupants.
Very easy to drown it - parking on the beach with even a small swell breaking will get splashing inside. After your walk (or beers at the pub) the inside will be totally full of water, and all that lovely
storage ability will have disgorged its contents. I managed this at least 3 times, until I learned to
anchor off and then swim ashore
I really really liked mine. Would I get another? Not sure...