I was (maybe without reason) expecting fast ring builds to come out every week or two and the slow ring to be once a month or so.
But, given that our fast ring releases are about once per month...
I install a fresh 10 build, on my main phone (Lumia Icon), and run it, hard-core, for a couple weeks.
I do a lot of feedback (I'm into over-communication).
Then, I'll go back to 8.1 for a couple weeks.
That way, I have a good opportunity to test and report.
Then, I have a good opportunity to actually use/enjoy my phone.
Hehehe...
People that knee-jerk back to Windows Phone 8.1 are just like people that don't vote.
You can't complain about the president, if you didn't vote for someone else.
You can't complain about Windows if you don't give any feedback about Windows.
If you don't like something, use official channels (which, of course, the Windows Central forum isn't) to submit your issues.
If you do like something, do the same.
Personally, I've found the Windows 10 Mobile builds usable but very frustrating.
On the other hand, I've used Windows 10 Mobile builds enough that I miss things when on 8.1.
I think the default fonts and icons are too small on Windows 10, but I also think they are too big on 8.1.
I think the release would do well to just split the difference.
Pretty much everything, from a usability vantage-point, is better with 8.1.
It's snappier, has less crashes, better battery life, etc...
We all know this.
I'm believing that 10 will, eventually, catch up.
These are pre-release builds, of course, but...
It irritates me when I see some new (and I would consider "fluff") feature added, yet well-known usability issues persist.
There are many bug-fixes, per build, and things are getting better.
I wonder if the major issues will be gone, by release time.
After all, there are still problems in Windows 10.
It amazes me how many times first-party apps crash.
Just saying...
JJ