[4] The US Aircraft Owners and Pilots Association (AOPA) tested the Sling 4 in 2016, citing a completed base price of US$123,417, rising to $192,000 with most options.

[5] In July 2013, a Sling 4 was flown by Mike Blyth and his son from South Africa to AirVenture in Oshkosh, Wisconsin, United States, carrying 20 hours endurance in fuel.

[6] A Sling 4 kit was completed in four days by 40 workers from the factory, and flown at a 2014 South African Airshow.

[4] In a 2016 detailed review for Flying magazine, writer Marc C. Lee praised the design's controls, handling, aesthetics and load -carrying capabilities, while pointing out that it lacks cruise speed, an effective heater, has poor rubber molding and lacks a USB jack system.

[7] A group of about 20 South African teenagers built a Sling 4 in about three weeks in 2019, with the engine and avionics fitted by specialists.