I would echo the same. I use the pro.... with C kegs. When cold crashed, I rack it to corny kegs. the adapters make it easy to use either.
On a different topic, anyone ever used a traditional Norwegian kveik yeast in a pico pak? The fermentation range up to 98 degrees combined with the valve for fast ferment, seems attractive. I wonder if 3-5 days fermentation is actually reality. I was looking at the Gjernes farmstead, Voss Kveik’s profile looked pretty darn good.
Anyhow, if anyone used those in the past, I'd love to hear more.
This would be interesting, turn some brews around within a week or two finished product. Let me know if you try this and how it goes.