“This small board is one of those products that do exactly one thing and do it right. It gives you an extra GPIO-Header and labels all the pins (in two different ways depending on how you mount it). It's very thin so it shouldn't cause any problems with hats mounted on the Pi header. It also has the nice black/gold/white color theme that Pimoroni puts on a lot of their boards and which I am a big fan of.”
“Brilliant extension to gpio when space is limited - works fine on all models, not just the pi zero. Requires some careful soldering - a bit beyond adding the standard header in terms of difficulty. Worth checking all 26 pins with continuity meter and adjacent pins after soldering”