If Internet Sharing is important to you, I don't believe it works. That is the ONLY feature unable to work at the moment. However, I did read somewhere that if you changed the Telus APN to a different address, the internet sharing works, but then data doesn't - which isn't very convenient.
You need to see what is important to you. For me, I've never used internet sharing so I don't really care if I have that feature.
Although the Lumia 920 is a nice phone, there are other WP8 phones that I'm sure you'd be happy with, that can be purchased TRULY carrier unlocked