As good as the same from Brewland (a friend has it to comapre)
The T-part I got with the is shorter than in picture which causes an issue with the aeration stone as it touches the end inside the T-part and does not leave much room for liquid which causes pressure build-up inside the part. The silicone tubing can withstand only 2 Bars of pressure and already exploded violently on my setup because of the pressure buildup. The connectors on the pump can only fit non-reinforced tubing so you are limited in the CO2 pressure when the T-part is fixed to have more room for liquid flow. The pump can withstand 5 Bar but the tube fittings on the pump does not allow connecting high pressure tubing. Two stars because the pump worked and did it's job until tubing exploded. Put the correct T-part on the package and a pump with barbed input and output so reinforced PVC tubing can be used and it will be a killer product. Otherwise I wouldn't deem it safe to use, especially when carbonating beers with high CO2 volume.