What is Reddit's opinion of Conntek 20601-040 L14-30 Generator Extension Cord (40 Feet) UL Listed?

From 3.5 billion Reddit comments

Obviously, pay an electrician to do the work if you are not able to pull a permit and do the work yourself, but it is far cheaper to go the manual route rather than the automatic route. This is far better use if $ if you are not going to maximize the use of the intelligent backup. ROI for the Sunrun integration is terrible, and unless it works for vehicles beside the Lightning, you just bought into a very expensive ecosystem.

1) 240V 30A generator cable. $100

Conntek 20601-040 L14-30 Generator Extension Cord (40 Feet) UL Listed https://www.amazon.com/dp/B00DTLJ1B6/ref=cm_sw_r_cp_api_i_28YPR6YPF4Y4A5FH3X5A

2) interlock $70

SD-200SA Square D Generator Interlock Kit for Homeline Meter Main 150 or 200 amp Breaker https://www.amazon.com/dp/B01MV05P2K/ref=cm_sw_r_cp_api_i_3ZSJYMPNK864C1RDW70E?_encoding=UTF8&psc=1

3) generator inlet $50

Reliance Controls Generators Up to 7,500 Running Watts PB30 30-Amp NEMA 3R Power Inlet Box, Gray https://www.amazon.com/dp/B000BQT47S/ref=cm_sw_r_cp_api_i_VT8D7BX2GPBATRHXN695?_encoding=UTF8&psc=1