This was the best place to stay! My room was comfortable and warm. In fact, I did a polar plunge and swam in the arctic ocean. The bathrooms are warm enough where my bathing suit dried over night!
Breakfasts are amazing. Great selection of food and I always a solid meal before venturing out for the day. The hotel staff is also great to work with. They are very nice and helped personalize my experience while there.
Longyearbyen is small anyhow but the Radiation Blu is right in the heart of everything. I wouldn't walk to the airport from there but there is a shuttle bus that drops you off to and from the hotel. Very convenient if you ask me.
I also met up with friends in the hotel's bar and it was great place to have drinks and eat. I also recommend the Nansen Restaurant, I had one of my favorite meals while there-- reindeer.
When staying in Svalbard again, I will plan on staying at the Radisson Blu Polar Hotel again. I've stayed there twice now and this last time and I enjoy it.