Got hair now but it

Is there anyone who is 2-3 years on from having had chemo who can tell me whether  hair returns to normal in time? I had my chemo about a year ago and while I am relieved to finally have a full head of hair again it is infuriatingly curly/frizzy. It takes me a laborious half hour at least with my cheapie hair straightener to get it semi-straight. And even then it still looks a bit of a fright. Does post-chemo hair eventually return to normal or should I go out and invest in one of those super-dooper expensive hair-straightners? (Sorry, I know this is a trivial issue but I'm exhausted from tamoxifen-induced insomnia and I'm just fed up with the bloody hair issue.) Janet.