Went to Tryst in Arlington center on Saturday for lunch. We were the first diners in the place (at 12) which always feels a bit funny initially but the place filled up to a reasonable level by 1 or so. The waitress said they've been open 6 weeks (despite the "grand opening" banner outside) and they've been doing reasonably well with more action at dinner time.
I ordered the steakhouse salad with arugula and the steak medium rare. Came out as requested, very simple but tasty. My friend ordered the portabello mushroom sandwich with sweet potato fries. The bun looked homemade. My friend commented the mushroom was smaller than she expected but she was fine with that as it wasn't overwhelming the sandwich that way. The fries were thin cut fries as opposed to the regular sweet potato wedges and they were wonderful.
We shared an apple pie for dessert which came with vanilla ice cream. Total bill was about $35 (before tip). I ordered decaf and after I tasted it, I asked to make sure it was decaf because it tasted so good. That always impresses me -- I've eaten at some very upscale places and when they serve bad coffee you wonder who how much they really care about food.
Our waitress was pleasant and relatively efficient. She was MIA when it came time to pay though, which is always a pain. The new decor is very cool and hip, taupey with red accents and nice dishes. The bar is a much needed addition to Arlington center -- the only other possibility is the chain "Not your average Joe's" . You do have to order food if you want to get alcohol though, so they have a special bar menu. It isn't radically different from the Tea Tray restaurant that was here previously (except obviously there is no longer a cafe and that area is now the bar). I'm guessing they are betting on the bar -- which might be a good gamble.
Overall it was a good experience. I don't know if I'd go back for lunch but I would enjoy meeting someone there for apps and a drink for sure.