I have a new blackbook picked up in the last few days and the quality has greatly improved from the first oen I had when they first were released. That one was a grease magnet and I sold it quickly. This one I have used and is not noticeable at all. There are the odd grease marks, but nothing as bad as my last machine.
Okay. I've also brought a Palmguard for it from Moshi, but would only use the trackpad + button film, and not the "plam-rest"-part.
Why? You're wasting money in that case. Just put the whole thing on and your Mac will be protected for years.
Well I know, but does'nt it looks silly? - I mean, you can see that it is on, right?
I have all installed on a MBP and you can't tell unless you look very closely. The Moshi color match is right on and the iSkin is clear.
Now I don't worry about keyboard wear or paint issues on the palm rest.
I don't have any heat issues leaving the iSkin on all the time.
I don't sleep my MBP because it's a notebook and I am usually using it and then securing it for travel or from the family pets.
My computer doesn't vent through the keyboard. I can not speak for the Macbook personally, but it sounds like some other people haven't had heat issues in some of your earlier replies to this post.
I'm not sure what the keyboard thing is you ordered. If it's a form fitted silicone skin, you should be able to tell right away if the keyboard is getting hot. It will get warm.
If it was me, I would be more concerned about the keyboard wear than the palm rest and stuff. The keyboard is where all the lint, crumbs, dust, etc. get into and the hard place to keep clean. The cover allows me to take it off, wash with regular dish soap and water, dry thoroughly and the keyboard looks brand new after 4 months of heavy use.
With the silicone skin, I have had no issues with marking my screen either. Just keep it cleaned regularly and all has been good.
Here is a link to another MacRumors Post that discusses this very topic at length.
It appears to be safe to use.
https://forums.macrumors.com/threads/373879/
I have the Moshi Palmguard and it blends in so well, you can't even tell it is on. I use it and the button cover. I tried the trackpad cover and had it remove it after a day. It was not sensitive enough for my liking. It felt like I was dragging across it. It was also a clear plastic and I didn't like the look of it. The Palmguard and button cover really look nice. I really can't even tell they are there.