"This set offers amazing value for customizations at an entry price, especially for a Technic. Combining it with a 8293 gets you true motorized mobility and headlights. Throw in a servo and an IR comm pair (receiver + transmitter) and you get a complete remote-controlled set. Add to it a NXT CPU brick and a couple of sensors and... wait, I'm getting ahead of myself : )
The only downside to 42075 I can think of is that it's out of print as of today, Feb 2020. Lego, please, bring it back!"