Swarovski have many different designs and they also provide cheaper lines (Oliver Weber) with their rhinestones. Since I live in the home country of Swarovski the jewelry is reasonably priced, the quality is good, the service too (the large crystal of my 4 year old ring became loose and they glued it on for free) and you have lots of nice designs to chose from. Daniel Swarovski (their couture line) is another thing though, I'd never buy faux-jewelry for a couple hundreds or even thousands of Euros when you can already buy real jewels with that money. But if you have the chance to check out the large new Swarovski in Vienna I'd do it. Lot's of affordable bling
I really regret not getting to see the Swarovski "mother ship" in Vienna the last time I was there.

I have some great Swarovski pieces, and people who aren't that well-versed in jewelry always think they're real & are surprised when I tell them. My friends who know a lot about jewelry recognize it for what it is, but they also agree that it's high quality. Even some SAs who've seen it have commented on the high quality of Swarovski.
DH doesn't like to buy me pricey jewelry (he's too afraid I won't like something he spent $$$$ on) but he occasionally picks up a piece of Swarovski for me. It's nice to have a mix of pieces in my collection.