Razer blade 2015 over heating. Real problem or just an inconvenience?

I was about to buy the blade QHD last night. I've read a lot about it and found people complaining about the heat problem. I have two questions to owners:

1-After how many hours of gaming does the laptop get really hot?

2-Is the heat a really big problem? Does it damage the laptop/ table it's on or ever cause burn injuries? Or is it simply an inconvenience?

I may buy it today, but that hugely depends on the responses I get here.

Razer blade 2015 over heating. Real problem or just an inconvenience?