Is the Insignia TV converter box a good one? It's the only converter box available to me through my Wal-Mart and it's still $40. I also have a couple of other questions. I want to make sure that my TV is compatible with it and I'd like to know if I need a different antenna. Thank you for any help. It's been almost 2 years since I've purchased my last converter which was an RCA and it only lasted up until last month before it went out.