It can be very handy, saves space, but when using it in a busy pedal board - please now take a birds eye view of your board - you need to consider that if you want to remove a pedal this is attached to, you cant just pry it upwards, you will need to move it left/right because this thing will hold it in place attached to it's left or right to the next neighbouring pedal.
I found my Mooer Z Connector over a short time just started to loose reliability, and I got to a point where I was loosing signal on my board and totally freaking out. Was it a pedal, my guitar, the cables, the amp? Traced it down to this.