These shields make debugging much easier. They are also an amazing teaching tool (since the single onboard LED on an Uno is a bit limiting, and sometimes it’s not practical to set up a breadboard with LEDs and resistors).
While I still end up with countless debug messages that state the obvious in the serial console, these shields make it really simple to check the activity on your digital pins.
The product is simple, elegant, and of excellent quality. Highly recommended for beginners (at very least).
As simple as it is, it's still a very valuable and useful tool when diagnosing issues with one's builds! Plug and Play. The shipping was extra fast as the seller is local so cannot judge how fast it travels longer distances but it was shipped the very next day after purchase.
The LED debugger works perfectly and as expected. The shipping took a long time and I thought it wasn't coming. I contacted the seller and it was shipped, and sure enough it arrived. It works well and I am glad I bought it.