I use it.
For the most part, it's very good.
Be aware that the various HO turnouts are slightly different, depending on which you use.
There are the #4 powered with the brass frogs. These are "power routing" and you can't change that.
There are the manual #4 turnouts. These can be set to power routing or non-power routing. You can also add power to them with an electric switch motor. Make sure you get the appropriate motor for the switch (left-hand or right-hand).
There are the manual #6 turnouts. Same as the manual #4's, except for the size and length.
There are the powered #6 turnouts. These can also be set for power routing or non power routing. Be aware that the power connectors for these has a tendency to "get loose".
For routing wires under the table, I bought something called:
Airsoft Tamiya Adapter Plug Pin Wire Removal Tool (Type: Small Tamiya)
With this you can "punch out" the pins from the connectors, which makes "slipping the wires" through holes in the table easier.
Works on all the Unitrack connectors.
I also used the Kato switch levers, which work well.
There are those who gripe that Unitrack doesn't look as good as flex track with hand-done ballast.
They're correct, but it still looks pretty good considering it's "snap together track". Kato did a particularly nice job in designing the ends. They -almost- become invisible from a slight distance.