Becca, As with other members whom have asked for feedback I would suggest before it goes live, have an editor go through it.
Your colours and presentation are really eye catching and at the same time easy on the eyes.
ALL of the pens are out of focus for me. I also can't figure out where your focus is.
I would like the very first image to be bigger - an eyesight thing.
I like the scrolling list but when I was scrolling to see the next bunch I was flipped back to the first pen. I think there needs to be a 'stop' of some kind when you get to the end of the pictures and maybe a forward or back button.
In 'products' I didn't know that clicking on the picture would take you back to the list of products. I kept using the back arrow which kept taking me back to the menu. Could be because I can be a moron about these things sometimes.
In 'Products' the pens took several seconds to load...it wasn't instantaneous but it also wasn't too long. Instant would be better though because most users are used to that speed.
Same speed loading issues with the stoppers. Also, I wanted to get to the stoppers using the menu on the left but couldn't. I had to scroll through the pens. You are probably very correct in your stopper descriptions, however, I always understood tru stone to be crushed real stone put back together in a way that made it easier to turn. Your descriptions indicate tru stone isn't actually stone at all.
An eye thing for me again, I find the font too small.
It reads like a lot is 'wrong' in my opinion. It's not. It's just when I am asked for feedback I try and give real feedback. I put myself in the position of being a person who knows nothing about the product but knows a lot about websites - not that I necessarily do!