I have an 09 so it is the same as an 08. Yes, it has a heat issue but it's not something disturbing on my bike. In the summer, with the side wings removed you will feel the heat. With those wings installed it is not a big deal until you have been stopped a while and again you will feel heat. Once moving with or without the wings the heat is not an issue. If you wear short pants you are a dufus and then you deserve to get burnt. So, if you are wearing jeans or riding gear and you're moving you will be fine.
As for me? I have the wings off and it's summer. Yes I can feel heat sometimes but to tell you the truth it's not that bothersome for me. One thing I especially like is this... after the sun goes down and it starts to get chilly I put the shield up, stock 09 shield, and I again feel warming air surrounding me. If you are the type that rides with a big aftermarket shield and rides with it up in the summer then you will roast in the day! It will be unbearable without those wings on. So it is how the bike is set up that matters.... some will say it is unacceptable and others aren't bothered.
Put pins in the luggage as per instruction found on the forum and forget any issues with luggage forever.
it's a good bike, stop worrying
vivo