Yes Sir! It is pretty friggin' good. I love the new angle on vampirism. I've enjoyed every episode (especially the first one that Del Toro directed) and the characters are interesting. I really like the fact that the series isn't an open ended series....that they have a plan for the show. From Wiki:
"they wanted to follow the books closely and liked the idea of The Strain as a close-ended series consisting of three to five seasons. Del Toro stated that the first two novels can be covered by one season each, while The Night Eternal may be split into two or three seasons. The author is also open to creative detours that may develop as the series goes on, possibly incorporating material cut from the books. Del Toro intends to direct as many episodes as his busy schedule allows"
Another promising show that I've only seen the first episode of (there's only been two so far) is "The Intruders" on BBC America. From what I gathered it's a spiritual possession premise...and, the first episode was kind of creepy.
"Legends" on TNT with Sean Bean has been pretty good as well. He's a real good actor....