What a difference this scenery makes. I used to think the default SEA was pretty good. Well, FlyTampa's version is gorgeous. I have a nice assortment of various AI traffic loaded up including vintage airliners and they all look tremendous parked around FlyTampa's SEA. Like all their products (I have 4 so far), this one is well-worth the money.
I keep adding FlyTampa airports. So far I have SAN, SFO, SEA and TNCM. I love them all. The attention to detail is phenomenal and framerates take little hit if any at all. One of my usual flights is from SAN to LAX and I was particularly impressed with Lindbergh. Compared to the default, this addon is a radical change. If you want VFR realism or just a nice place to blast out of in your A340, FlyTampa airports are money well-spent.
This product is fairly mediocre. The sound is just downright poor. Overall, I don't think it's nearly as good as the 707 and I feel you can do just as well with 727 freeware.