My wife and I recently went to Isabella's with 4 other couples for a night out. Frederick, MD is about an hour drive for us, but we wanted tapas and we had heard Isabella's was where we should go.
Our first impression of the restaurant was great. It had a great atmosphere and we knew from the number of groups dining together that we were going to have a great time. They do have outdoor seating, but not for a party of our size. On a nice evening, the lively feel of downtown Frederick would make for a fun backdrop. Just make sure to call a week or two in advance for a reservation (they fill up fast and we had to postpone our trip here because they couldn't accommodate us 5 days out).
Our server greeted us immediately and took our drink order. Even with 10 people to wait on, service was adequately paced and we never had to wait long for anything. Two different managers even made their way to our table over the course of our 2.5 hour meal to check on us and say hello.
The food at Isabella's is great. We went specifically for tapas, but they do have other entree items on the menu. We ordered a bunch of tapas throughout the course of the night and ate everything family style. Everything was delicious and reasonably priced.
If you are going for tapas, definitely try the bacon-wrapped dates. While one of the pricier tapas (per the amount of food you get), it was the best-tasting item we had, and we ordered several more of them over the course of the meal.
If you're looking for a great place to go eat with friends, don't hesitate any longer - Isabella's will not disappoint. If you're going with a significant other, I'm sure the experience is just as good. We will definitely be back!