I have 19 Gold Comets which are also called Red Sex Links and I can promise you that you'll not find a better layer. Ours are all under a year old so technically they're still pullets. Since January 1st we've gotten 378 extra large brown eggs from our Gals. We get 17 to 19 each and every day without fail. We don't push them with lights or anything like that. They get good layer pellets, clean water, fresh greens on a regular basis, and a clean, dry, safe place to live. Everyone told me they'd quit laying in the winter or they'd slow down. But they've been laying machines even though we had daytime highs from Christmas until this week in the high 20's and low 30's with nighttime lows in the mid to low-teens. And in addition to being great layers the GC's are really nice, people friendly chickens. They love being around people. They'll come up to you when you're working in the coop cleaning it and give you an earfull of squawking and clucking. They're also really hardy. I've not had a case of anything with our Gals in the year since we started keeping chickens.
This 'True Breed' stuff is a bunch of hooey in my opinion. You're not talking about show dogs here. If you want fancy ornamental chickens then get yourself some Silkies or Polish Buffs. You're not to get layers though. But if you want chickens that give you a lot of eggs you can use for your own family and friends and sell what you don't use to your co-workers or others, get yourself some Gold Comets. The best laying chicken you can find, bar none!