This is a great quick start product which gives you a good basic description of the Infinity world, clear and interesting simplified rules and an interesting introductory adventure. I always find rules in quick start products difficult to read through, but that wasn't the case here. I wasn't familiar with the 2D20 system but the mechanics seem good (and remind me of Pendragon in the core concept). The scenario had a nice premise and although I haven't played it read well and I certainly intend to.
The scenario is open about the fact that because it's a quickstart they've cut out the investigative part of the scenario and skipped to the action; this doesn't harm the adventure as it is, but having seen what was omitted (which was made available to Kickstarter backers as an update) I think it will be much better in it's complete form, especially if you're a fan of investigations. However, the sections contained in the quickstart look exciting and fun to play, and even if like me you don't know anything about Infinity really gives you a sense that the PCs are being put in the middle of something big from the outset.
The only very small issue I had with this was that the pre-generated characters took a bit of time to understand. The factions are explained, but not necessarily the sub-groups that these characters belong to. Possibly one or two sentences extra for each (and not from that character's perspective might have helped). For example, when I saw a character profile with 'Reverend Moira' at the top, I assumed that was the character's name, not her profession. If you know about Infinity (or can use a search engine as I did) it's not really a problem, but it would be worth doing a little research on each of the PC's backgrounds before running this if you don't already know. The PCs do look like a good and interesting group though, and the factional perspectives and sub missions are a really nice feature of this game.
It's also been very positive to see the updates that have been done to this product based on user feedback.
Overall, a product hasn't made me so excited about a game or setting for a long time. Normally I download free quick starts, skim them and then never go back to them. With this I've gone from not caring about Infinity to backing the Kickstarter for the RPG and looking very seriously at the miniatures game too.