There have not been any negative comments, but you'll note that several people have told you that they bought what you bought and replaced it fairly shortly thereafter. And I told you it wasn't what I would have bought (nor what I would have counseled you to buy, had you asked me). There is nothing about the Knighthawk that is BAD -- the BC works. Most all dive gear, except very old stuff, works, because the liability is too great if it doesn't. Things like tank stability or weight placement or pocket functionality may not be great, and as a beginner, you won't know how much those things impact your diving, because you haven't had an opportunity to try other gear, and just managing underwater is probably maxing out your bandwidth (as it did all of us!).
Your shop did well off you, but not necessarily by you. You bought very expensive equipment, and you almost certainly could have gotten stuff that would have worked as well for you at significantly lower cost. BTW, I did very much the same thing, although I didn't spring for top-of-the-line/top-of-the-price-range gear as a new diver. But almost everything I bought had been replaced within a year, as I became an active diver and found out there were things that worked much better for me than what I had. I did sell much of it, usually for half or less than what I had paid for it.
Go dive the gear you bought. It will work just fine, and what you need now more than anything else is to GO DIVING. You may end up replacing some or all of it over time, but if you're into other gear-oriented hobbies, you're probably quite familiar with that process, and it may even be part of the fun