I have about 9 1/2hours on my Pintxo bar. It works fine. It takes some time to adapt.
The two biggest challenges have been the feel of the light weight bar, and the changed bar position due to using the Wichard and a new line set. The bar sits about 150mm closer to me than my old bars with a chicken loop.
I have had a bit of a play with the trim adjustment. At first it was a bit sticky and hard to use. That got easier, presumably because the knots settled in, I practiced it a bit more, and I filed the point off the screw.
To an extent the 60cm bar travel makes the trim adjuster a bit redundant. When the wind pushes in I just hold the bar a bit further out and everything works just fine.
If you want a minimalist bar then the Pintxo is the one to get. As Rainier says, it has everything you need and nothing you don't (although some of the things you don't need are quite nice to have).
I have added coloured pigtails to my bar. I needed to do that to connect to my kites. The pigtails also make for a nice closing hitch when I tie the lines to the bar.
My preferred way of rigging is to link the ends of all the lines together so I can attach the lines to the kite, wind out, launch and go. No dropping the bar in the sand and walking the lines to the kite. It was easy enough to work out a winding system and set of hitches on the bar to do that ( wind the line, wrap and hitch to secure, join the line ends, wind the remaining line, wind the individual bit of slack line until all the line ends meet, then wrap and hitch to close). I just had to think a bit and practice a few times. The few times I have ended up with line crosses after winding out the bar is so light it is easy to pass through and sort things out.
I haven't decided if the changed bar position is a problem yet. It is a problem if you're not prepared for it. The front-rear line lengths will settle with use. I may add some knots to the kite rear pigtails, or change the Wichard attachment so that I can tune the bar distance from my body depending on the day.
The one thing I really like is the long bar throw. I am already imagining building a very long travel bar with no trim adjuster (I have long arms). That would be super clean .... but maybe some bar floats and big squishy bar ends with bungies.