skun....
The ML part is obvious same as other sports....
The puck line is usually .5 & ML....sometimes it goes to 1.5 & ML...
If you go to my website which is simply my avatar name dot com I have an article there called understanding hockey wagering....should help in understanding....
In a nutshell the .5 is very relevent as there are many ties in the NHL, if you are -.5 of course you lose if the game ends tied...if you are +.5 you win if the game ends tied...
Over unders are exactly the same as baseball...(you may find the over or the under heavily shaded one way or another however, even more so than baseball.