We've been season ticket subscribers to the Theater for many years, and have enjoyed a wide variety of musicals, comedies and general drama plays. It's the closest you'll get to Broadway in Philadelphia. Each year they put on 5 new productions, which I broadly categorize as 2 good, 2 OK and 1 snoozer.
If you are looking for a good night out in Philly then I'd recommend dinner and a pay at the Walnut. Check ahead and see what's playing as it will usually be something that you recognize. You'll find that the cast is enthusiastic and engaged, the acoustics are super, the sight lines are fabulous and that the seats are tight! If you are over 6 foot or about 220 lbs you will appreciate iNtermission when it comes.
Some useful tips
1. Handicap Access isn't great.
2. Bring your own snacks for Intermission. The bar is expensive, crowded and has limited stock. There is a Wawa and a Starbucks within a block.
3. Just like flying, go for an aisle seat if possible.
4. Contrary to other reviews, There is ample parking, but it's not cheap.If you're staying in Philly take a cab or walk. Don't park in the Wills Eye Hospital structure if you love your car.
5. Many restaurants offer discounts to ticket holders . Check the WST website.