We only tiipped over once years ago.... and that was about our 3rd time out. All of a sudden a rare, very sudden squall with big wind and driving rain (lasted 15 min) got me going too fast and I lost control and over we went .... We got it back up in about 2 minutes.... same principle as a sun/sailfish. What's nice to note is that the good folks at Aruba Watersports sent a boat out to help as soon as we spilled. We had it back up well before they got to us. I'm in average shape and not a young person - and didn't lose my glasses .... so, if you've done a sail/sunfish, you should be fine! Actually, do it early in your vacation.... you'll do it again and again!
I love to sail and booked a trip 2 years back at the Divi -Tam because the sunfish and other water toys are part of the all inclusive plan.
But be warned, a sunfish is more of a flat water boat and with the trade winds (15 - 25 kt) and 1-3 ft waves it's a challenge you won't forget. I race during the summer so I brought my gloves and reef walkers. The gloves for when you ease the sheet or more exact let it run, this way it rubs/burns through the leather and not your hand and reef walkers when you are hiked out horizontal trying to keep the boat down. the wind and waves will pick up as you head out south east toward the channel were you will tack to come back in toward the beach.
Arubalisa mentioned the lasers at the sport shop on the beach down by the radisson and I hesitate to question Lisa on anything in Aruba, but when I was walking past the shack I briefly asked the guy out front about laser rentals and he said yes but I never followed up so I don't know if it is only for a sailing class..