Hair Straightener help?

okay, so i have a chi and have had it for almost a year and it works great! So i dont know what to say about that. as for wanting one that can outlast humidity and keep hair straight all day doesn't have alot to to with the straightener, it has more to do with your hair type. i suggest using products that protect against humidity and ones that help your hair stay straight. i hear that finishing spray helps your hair stay, and makes it look shiny.