It depends on your use! They have comparable ones for less money, but for me and my purpose, Moleskine is the way to go! They're not super expensive, depending on the size, functionality, paper weight, texture... they have many options!
I use these notebooks for school. I buy one per academic year (at most) and I LOVE them. I like the quality of the pages and you can get them in hardback or soft cover. I recently purchased the thin Moleskines that come in packs of two. I love them. You can also purchase moleskines at a cheaper price on Amazon.
Totally depends on your style and willingness to spurge. But quality and its cute designer styles are some of the main reasons why I keep going back to moleskine! you can find deals/sales at chapters and stuff sometimes!