My favorite RY4 was Liberty Flights Original 100% VG RY4 but unfortunately they quit making it. I've tried several venders RY4 but none of them really appealed to me. I'm now getting my RY4 from My Freedom Smokes and it's real close to the LF RY4. I've tried mixing my own RY4 with both Flavor Apprentice and Flavor Arts and it always tastes bad. Nothing like the premixed stuff I've bought. I'm still looking for a good Pina Colada though. Most of the premixed Pina Colada juice tastes just like the Flavor Arts or Flavor Apprentice flavorings that I've tried to DIY it with. Juggler was the last one that made a really great Pina Colada and he quit the juice business.