To my knowledge, it doesn't negatively affect your application in any way (one of the first things I checked before ordering). The order process is easy, especially if you use that thread, it literally tells you how to answer certain fields and it's free. In my case, it would appear to have bumped my PO as my notes were due at earliest Friday, and I got my test invite Monday and my notes Tuesday. It's not a cure-all, solve-all, but it just gives you a bit of insight into what the office on your case is doing, so it's nice for a little peace of mind. From what I can tell of other people in my district, once you get to the test stage things move relatively quickly but waiting the 3+ months for the test invite was nerve-racking. My new goal is to have my oath date before my birthday at the end of August. Just remember we all applied post-bill change so there are a loooooot of people (not even on this forum) who are in our shoes waiting, it'll take a little bit but it will come through.