Yup. I was subscribed to their trout box for about two years.
Good way to check out new patterns and load up on attractor patterns. Some of their nymph boxes have included some really effective and nicely tied flies in the past (golden stones, and other cool attractor patterns that I have caught a lot of fish on). Quality of the flies has always been superb as well. However, they did get slightly repetitive with some of the patterns they were sending out (sending out the same, if not similar flies during some of the same months every year), which wasn't a big deal, as they were effective flies that worked and good to have in my box. Good value for your money, in my opinion.
People don't seem to understand that the other "gear" they send you - be it nippers, a leader, indicators, a tape measure, croakies, sample things from other companies etc. are freebies, and a lot of people complain about what freebies they get in their boxes. You are paying for the flies, not the freebies that come with it...as well you also get a nice color pamphlet that runs through what flies are included and their uses and some fishing advice, etc. You also get a cool bumper sticker in every box too.
I recently switched to the trout fly tying box and I am not disappointed at all. January's box was an emerger nymph pattern with plenty of extra materials to go around.
Since we are all in PA on this forum, I would say they do a good job of covering a lot of popular east coast patterns, however, I imagine most of the flies are not as useful out west. I do believe they plan on rolling out the option of regional fly boxes in the future.