I remember trying to awkwardly explain what I'd bought when the package arrived, because my whole family was stood there, and this was before I was out. But they didn't find it odd, and I was able to get up into my room and try it on. The first thing I remember is how tight it was. I'd bought a chep one from eBay, because I had hardly any money, but it got the job done. The first day I wore it, I was constantly having to run to the bathroom to adjust it, because it was affecting my breathing. After about a week or so, it had stretched our more, and I could wear it at the tightest sort of setting with no problem.
Aside from physical feelings, it was wonderful to look at myself in the mirror, and see that I was starting to look like what I wanted. I couldn't get myself to be completely flat chested, and I still can't, because of annoying things with sizes. But, since I'll be getting more money soon, I'm thinking of buying a higher quality binder, though where from I have no idea. Sometimes it's disappointing to look down, and see that I still have some kind of chest, and it usually takes a couple hours of wearing it, and leaning on tables/folding my arms to get as flat as I possibly can, but it's better than what I used to do.