Kerry,
We have a timeshare in St. Martin (Dutch side), though we don't go every year. We've probably been there at least 10 times. So ask away.
I don't think the Divi is any more commercial than most of the places on the island. I hesitate to be too negative up front, but I thought I should try to be as frank as possible. The island is small, and in recent years, it has become grossly over-developed. There is really only one road that circumnavigates both sides of the island, and it can get awfully congested. Traffic is a problem.
You MUST rent a car, though. I can provide some good suggestions - not the majors. (We usually use
Unity. Michael is terrific. Jeff Berger prefers
Tropical/Tropicana ) NEVER, NEVER, EVER leave anything of value in your car, even in your trunk.
That said, you can have a wonderful time on the island. The restaurants are great, and the beaches are superb. Which of the latter you like depends on your preferences. We choose quieter, more family oriented beaches (even for just the two of us - but we're old), such as Friar's Bay above Marigot, or Le Gallion, on the Atlantic side. (See
this Mr. St. Martin site, as well as Jeff Berger's (below) for the best descriptions of the various beaches. As for other tastes, the government on the French side has started cracking down on nudity on Orient Beach, except for one section (see Jeff's comments). Also, access to another popular beach, Cupecoy, has been hampered by a big development. (What else is new?)
What I'd really recommend is that you visit
Jeff Berger's Everything St. Martin Website. It is annoyingly complex, but I think Jeff provides the best advice and ideas about all aspects of the island. One thing he constantly urges is to get SkyMed insurance before you go. I agree it's worth it. He also has lots of restaurant reviews and other suggestions (if you can find them), including very good and helpful information about beaches and shopping.
L'Alabama, our favorite restaurant (and his), which is in Grand Case, on the French side - the "Gourmet Capital of the Caribbean" - has just changed ownership and chefs, so I - and he - don't know what it is like now. But there are lots of others. Depending on when you arrive, you might want to start your visit on the first night with one of his and our other recommendations, which is much more casual --
Turtle Pier in Simpson Bay. If you do, try the coconut shrimp and/or conch fritters, unless you want to opt for lobster. (Gosh! I'm making myself hungry!)
And incidentally, we've been to Saba twice, once on a day trip and once for several days. It's a different and interesting place. If you like to dive, it's a must. Otherwise, it's pleasant and quiet with not too much to do, though it's a good escape from the traffic on SXM. Be aware, though, that the only real beach is composed of volcanic ash, not sand.
Be in touch!
Ann