The books themselves were fairly enjoyable. (The first few anyway, I never finished the series.)
No, they aren't the best prose written, but they aren't the atrocities everyone is making them out to be. I chalk that up to... nvm. Rules and all.
If you want good post-apocalyptic fiction with little to no real foundation in scripture, The Stand or Swan Song will serve you better. If you want a speculative account of how the events of the Book of Revelation might come about, that is biblically based (whether you agree or not is up to you, but shouldn't interfere with a sampling of at least the first book.) then Left Behind might interest you.
Yes, there is heavy usage of phones, but the main characters end up in various countries around the world... how would you like them to communicate? Telepathy? There is also heavy use of laptops and the intrawebs, as should be expected. Heavily (even overly) used plot device? Sure. Fetish? Hardly.
Now, as to the movies. Mediocre at best, but definitely better than the 'Tribulation' trilogy that is a few years older. Kirk Cameron is a decent enough actor and I believe his film wife is his real life wife, who also does a decent job. Special effects are a bit cheesy, but not horrible. And of course the fact that the series didn't get finished. So, much like the books they aren't high quality films, but they are hugely better than other available Christian funded similar projects. Worth a rental, but not something you probably want to buy, unless they are in the Wal-Mart bargain bin.