Well, a few years ago I tried it. And I was Pretty Bored. Not gonna lie, it didn't appeal to me at all. And I have that problem with the whole series. I loved the design of Cure White's dress though, reminded me of a sweet lolita dress =)
But you know, Pretty Cure is 2004 material. Just like Mermaid Melody and Tokyo Mew Mew. Very decent for it's time, but comparing it with recent stuff is unfair. Those series are 8(!) years old. And it's not just the animation that's better (I honestly think that anime from the early to mid 00's had terrible animation and I would choose 90's cel animation over them any day of the week). The uudience changes, it's looking for different things. Futari wa Pretty Cure and whatever the latest season is atm, may be part of the same franchise, but are totally different series.