I retained my 1yr 20% off. I'll renegotiate next year again. I have no contract. Keep options open. If you are willing to go 2 yr contract, 30 - 20 is pretty good. But, try to go for 30% off 1 yr only. I own my own equipment (HDPVR SA8300) so if you are happy with Rogers go long term. I will move as soon as my 4yr old PVR breaksdown. Renting for 1yr free is great but time flies so dont be caught paying $25 (?) mth to rent when offer expires. Look for cheap deals (if any) periodically and christmas time. I think very very few actually pay $25 mth because they bought their own or have 1 yr or 2yr free. Renegotiate for free rental always or move. As for type of PVR- there has been no upgrades for the last few yrs on their best one HDPVR SA8300 - ask for HD, Dual Tuner and you'll be fine.
I was also upgraded from Express to Extreme. Offered 1 yr deal 30% off. My bill was messed up because the credit would not go through. After speaking with 2 or 3 people for over 2hrs total, the last guy said all he can do is give me an instant 1 time rebate of $95 to cover the 10% for 12 mths and now I'm back to 20% off 1 year. Just check your next bill, because they have stopped giving 30% off 1 yr for Internet for the time being. Negotiate and demand 30% off and take the 10% rebate upfront. Say your friend got it so you want it too.