Hey everyone, I'm a first time Mac user and I'm waiting for delivery on a refurbished MBP. I'm eligible to upgrade to Lion (comes with SL) for free. However, I've heard mixed stories about Lion and am not sure if I should upgrade just yet. I have a couple of questions though. If I redeem my upgrade code, can I choose to not install Lion right now, but keep it for future use? If I install it, can I go back to SL, yet keep Lion? Thanks for any help on this.