I am seriously asking. I like a few things about FCPx, and I really like one or two. I don't want to give it short shrift.
I can't speak to the noise issue, as I haven't seen that.
Besides being a software developer in my day job and on the side as an iOS app developer, I recently went back to school and earned a B.A. in Communication-Broadcasting. We produced both live and live to tape TV shows during the program, and used FCP throughout the program. I bought my own Panasonic DVX100B and FCS3 so I could shoot and edit on my own time without checking out school cameras or having rely on an open seat in the lab. I bought FCPX a couple of weeks ago and reimported a couple of weddings I shot and am working on that are due in a few weeks. I'm certainly no expert on FCPX, but am getting familiar with it and so far like what I see.
The only feature I see missing from it right now is the multicam editing, which I used extensively in one of the weddings. However, I'd already completed the ceremony in FCP7 with 3 different camera angles, so I'm not hurting to have it available. You can do a good approximation of it though from what I have seen, although not a perfect replacement. The results of course would look the same regardless of which FCP you used, you just don't have the ease of switching cameras on the fly and building a broadcast.
Being able to fully utilize the computer's resources (CPU, GPU, RAM) is a huge plus. Background rendering, plus. The organization features, big step up. The flexibility of moving clips around, and collapsing elaborate clips and edits into the timeline, plus. Auditioning clips, HUGE plus. You can set exact duration of mattes and transitions. You can edit extensive controls of any effects and filters. Some functionality of some filters may be improved reducing the amount of controls needed, but the power is still there. It's not just a pretty new interface, there is a lot of power under the shine.
You implied you haven't taxed the application yet, so there may be a lot of tricks to discover still. I know I haven't even scratched the surface yet myself. IzzyVideo.com has a very good overview showing many features, and what Izzy did that a lot of people didn't was jump right into the software and figure out what you could do with it, instead of looking for what you can't.
I sold my copy of FCS3 and won't be looking back.
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We can't know sales, but one barameter (not scientific of course) would be to look at the NUMBER of reviews for FCPX.
After the first week, when people were rushing to buy it sight unseen, FCPX already had 1500 reviews in the mac app store.
Now here, almost 3 months later, there are only 2007 reviews.
Only people who buy FCPX can review it in the mac app store, so the glacial growth of the number of reviews in the past 3 months may hint at the sales pace as well.
Most people don't leave reviews for anything. I have an app on the iOS App Store that has over 9,600 sales, but only 65 reviews last time I looked. It's still a 4/5, but the handful of negative reviews sting extra hard because they stand out. Even worse when they're complaints that could have easily been resolved or explained with an email to my support address.

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Ok, Danimal99 (who's handle honors one of my all time favorite Chicago Bears players) do you have an answer?
He didn't whine, he laid out some very specific things that make FCPX a WORSE way of doing things, rather than better.
You made a strong statement without backing it up. He's given you a chance to refute him ... so where'd you go?
To bed, then to work.