Escaflowne is an interesting story, but comes across as a little dated for people newer to Anime. I'd still recommend it, and with tracks from Yoko Kanno (also worked on Cowboy Bebop) there is a lot of good things in this series. The story centres around love as a main theme, but considering it has cat poeple and giant fighting robots it is well balanced in terms of content.
The box set is pretty sparse though, just a few dvds, with terrible menus. It also isn't the best of quality when watched on a HD TV, it clearly has not been remastered or touched up in any way. I don't know if it is possible to get a better quality copy anyway, so don't let this put you off if you want to have the entire series.