Gel nail polish is definitely worth it. About 10 months ago, though, I started using Color Street nail polish strips- I love them so much I started selling them! Both a great options for longer lasting manis!
I love a nice gel manicure. I'm with Erica though and only do them for special occasions. My nails are definitely weakened by the gel polish but my nails recover quickly. My gel manicures usually last at least two weeks.
I just had gel on my fingernails. The lasting power is amazing, but when a nail breaks, it's likely breaking to the nail bed due to the way the polish adheres to the nail's surface. Also it is much harder to remove.
On my hands I always get SNS. I like how neat it always turns out and how thin and natural my nails look. For my toes I get gel. I had did it once because I had got my nails done on my lunch break and needed to put my foot back in my shoe. But after I realized how nice they looked I haven't been back to regular nail polish.