Overall I was happy with Swiftech and Koolance’s efforts. Koolance did real work to improve the usability of their QDC range. The price is right and the new mechanism feels great. They are large and I think that is the next avenue for Koolance to tackle. I’d also love to see the QD4 with a G 1/4 thread.
Swiftech on the other hand brought new ideas to the table with it’s interchangeable heads and compact footprint. The QDC works great and my only real concern is the price. Because of this and how much I like the Koolance push-to-release mechanism I have to give the edge to Koolance. However if you need or want something more compact and can afford it then I wouldn’t hesitate to choose Swiftech. Both are highly recommended.
Phobya on the other hand is a different story. I didn’t like the push mechanism or the quality or the restriction. These are budget alternatives and they are at least priced with that in mind. However they cut corners a little too far and I can not recommend them.
From top to bottom: Koolance VL4N, Phobya Push Type, Phobya Push Type, Koolance VL3N, Koolance QD3, Phobya Twist Type and Swiftech Lok-Seal