There is a lot to love about Spyderco. They are innovative and lead the industry to an extent. They offer a fun selection of steels. They also tend to deliver a good heat treatment on their super steels.
There are also a few of things I don't like. Most Spyderco knives I've owned have ended up being projects, with chamfering crisp edges being both the most minor and most common thing I end up doing. That's not necessarily bad but I don't like their position on customers taking their knives apart. They won't ship replacements for internal parts and have a minimum charge for warranty work. They will send out replacement pocket clips but last time I needed one, it cost me like $12. (Not the end of the world but I've gotten them for free from Kershaw and Kizer only wanted $5 to send one all the way from China.) Disassembly and reassembly in general can be a pain with some models. I've had persistent centering issues on some of their Chinese models too.
Speaking of, their Chinese-made budget knives are way behind the times. Models in 8Cr13Mov and FRN cost over $50 while other companies making knives in the same country are using 9Cr18Mov, 10Cr15CoMov, or even N690 with G10 or Micarta for less. Sal has confirmed that they are researching an overall upgrade but it could be years before we see it.
To finish on a positive note, Sal actually takes the time to talk to customers and engage with the community. Even me.

That's a big deal.