First impressions on Google Cardboard

If you don't know what Google Cardboard is, its the poor man's Virtual Reality set. Of course how poor is the man who has enough $$ to spend on a 5'' android phone is questionable, but lately at least there are a lot 5'' Chinese phones that cost quite cheaply. Anyway,

I got mine for 10$ from DX.com
I don't know if all cardboards are made equal, I would assume all use the Google template, but in my case:

1. Not all noses were created equal. More nose clearance required!
2. Google cardboard app has a bug. I cant constantly spin around myself to steady the environment I am watching. I need to sit down occasionally! Actually it seems to be my phone's bug. The gyroscope shows a small negative reading, which fluctuates a few decimals constantly, no matter what. I do not know how to reset it so far, or fix it in anyway. There are tools to check it, but haven't found anything to zero it.
3. Control of VR environments needs improvement. I can use a wired or wireless mouse but I get the feeling I would look like a dork.
4. The world is really immersive. You can loose track of your surroundings and hit on furniture and stuff. 
5. You need to have VERY clean lenses and screen. The smallest smudge looks like fog.
6. You need to have very high resolution screen as well. It works on low resolutions sure, but you see the bits the image is made of. The actual fabric of your universe.
7. A major flaw is that you can't use it while lying in bed unless you enjoy blue skyes and ceilings. What kind of personal experience is this that cannot enjoy from my own bed?