What I like most is the timer's ease of use, just dial in the duration and go.
ELECTROMATIC S-SYSTEM SC 205 724 RECYCLER SYMMETRICAL 24 VDC 0.15-3 SEC
A way the pin style relay works with common test leads for quick checks.
The pin style relay has a straightforward look, which helps when you are teaching someone the basics.
You can spot the pin style relay right off, and it helps keep cable runs neat.