Compatible but...
This is almost compatible with Boomjoy mop.  Almost because the pad is not entirely soft microfiber.  It contains a mixture of the plastic fibers and can be prickly if you run your hand and fingers through it; hence, it's not comfortable to wash by hand.  But I use this to mop up the concrete floor so it's not a big deal.  Also, it's just a few millimeters shorter than the Boomjoy mop, but still fits on the stick.
Rating: 3 stars