Good product that gets the job done. These collar stays are very well built and are good quality. I've been using them for work (about 4 days a week for the past 5 or 6 months) and they show no signs of wear. They look just as good as the day I got them.

The ability to adjust is great - I used to have a huge pile of collar stays in several sizes, and I hated having to shuffle through and find just the right size for the shirt I was wearing for the day. Now I can just slide up and down to size  for each shirt. It's a huge convenience.

I have a few complaints though. They're a little pricey (should be $20 tops - but they'll last you forever, assuming you don't lose them). Also, I was it was a hair thinner and a notch shorter. The smallest size is just a tiny bit too big for some of my shirts from Banana Republic and Express (medium size). This tells me that these stays might be too big for some smaller sizes. They're also much thicker than the average collar stay, but that's not a big deal for me.