OK, OK, I'm going to join in on the chorus and give this thing a ten. One of the great things about this film is the genuine, real Coney Island setting. Real location settings like this were pretty common in the silent era but got lost a bit once sound came in. Arbuckle, being a Sennett veteran, no doubt was inspired by his former boss. Sennett shots tons of films on outdoor locations.
Keaton is not 100% in vintage form simply because he smiles and makes broad gestures, something he'd never do on his own. Other than that, he's physically in top form, doing some wonderful falls and stunts. Love the random backflip he does in the lifeguard uniform, and the falls he takes on the bumper cars earlier on really had me laughing. Also, rule of thumb - yes, that probably was Buster being a stunt double for the leading lady. Whenever you see a long shot of a female taking a ridiculous fall in a Keaton film, it's Keaton doing the stunt. The most famous example is in SHERLOCK, JR.
Arbuckle is totally enjoyable, running away from his wife, hiding below the sand, and doing that classic, fourth wall breaking bit where he gets dressed on screen and instructs the cameraman to move the camera up so we don't see below the waist. The physical stuff he and St. John do in their fight towards the end is awesome, even more impressive because of Arbuckle's size.
This short is paced beautifully, and no moments feel too fast or wasted like some of the random chases in previous entries. This film is a pleasure all around.