Ok, here's my feedback on the new UI. I wanted to let it mature a little bit so I don't sound too critical

, but I think it's been out for a while now, so my feedback is about due.
First, I would like to say that the modern look-n-feel is really a welcome improvement from the old UI, which has certainly started showing its age.
Things that are welcome:
- The single way of accessing various features. In the old UI you could get into some pages by either using the top menubar, or by the items in the left pane, which was certainly confusing, especially for new users.
- The color theme customization
- The fine-grained graphs on the dashboard page (I don't have to wait 10 minutes for the graphs to update)
Now for some constructive criticism

. Please bare with me :
- It would be nice for the dashboard to be customizable. Levels of customization that I thinking about: (a) the type of boxes and their ordering (drag-n-drop to reorder would be nice), and (b) nformation that is presented in each one of the boxes.
- The "Reports" page is next to useless. In the old UI, I lived out of the reports page and I was able to get an idea (for example) of how much were the disks accessed (the most important aspect for me) just by looking at the disk pane. I can't do that with the new UI. Below are some issues that bug me in the Reports page:
a. Each device or metric (each box) is way too big to be useful. I can barely fit 1.5 box in my screen (on a 1080p monitor).
b. It would be nice to merge multiple metrics in one box (for example what the old UI did with CPU information), to save screen space
c. Please rename some of the entries to something more obvious: I think disc_octets means disk throughput, but I am still not sure
d. Please re-work the units for some metrics. Seeing a write bandwidth (disc_octets) of 34529493.33 is kinda useless.
e. Large number of CPUs needs better sorting. Right now I see: cpu0 | cpu1 | cpu10 | .. | cpu2 | cpu20 | cpu21, etc.
f. Similarly, the following is kinda painful: "Items per page: 20. 1-20 of 74", where all I want to see is a glimpse of my CPU information.
g. When the items per page is large, performance is too slow. It needs to be faster.
h. Under the "Disk" page, in my opinion the order of metrics have to change. For example, the default page of disk_time for the 1st device (which most likely will be the boot drive) is almost always not what I'm looking for.
i. The graphs try to smooth out transitions, but sometimes order 0 (step) or order 1 (linear interpolation) maybe a better solution. Trying to interpolate with a spline undershoots and overshoots on a step transition and provides false information.
j. Similar to (h) but for the Network pane. In my opinion it's more important to see network throughput rather than network errors by default.
k. Under the Partition pane, again the units needs some rework. Seeing 44362237045494.45 does not mean much.
l. Again under the Partition page, the "Total" metric is meaningless. Ditto for some other metrics, like disk temperature.
m. General comment: Items under the graph need a better algorithm for tabulation. Right now things are not always aligned when the number is too big. For example, it would be nice to have a heading with "Current", "Min", "Max", "Avg" and "Total" instead of repeating it on each line.
- For "Shell" and "System processes" it would be nice to have a way to quit the window, as opposed to leaving it by selection another tab. The current model makes you feel that you left something running.
- When you display "Groups" or "Users" (or any other kind of page that has a lot of items to be displayed), there is no progress indicator, so it makes you wonder what's going on (until it populates). The only way I know I need to wait is that the bottom line says something confusing like "1-0 of 20".
- In many pages that show a list of items, too many columns are being displayed, so you only see half the information. Usually the 3 dots that show you the options are way out on the far right, and makes you wonder how you can perform certain actions. Yes, it's functional, but it's not good UI design.
- In configuration pages, the length of each line is too long, and the help question mark (?) is all the way to the right, which is kinda awkward. Either have the help button closer to the description, or somehow resize the contents to make it easier to the eye.
- I have some issues logging in sometimes (Safari browser). I put in my login credentials, and I have to waiting forever. If I reload the page, then I'm logged in to the Dashboard page.
All in all, I think the new UI has a great potential! Yes, I know, baby steps, crawk-walk-run. I love FreeNAS, I've been using it for close to 8 years now. The stability and underlying OS support (mainly because of FreeBSD) is great. I do want to see the new UI match the beauty of the implementation.
Thank you for such a great product!!
George