I've never tried a Reo being as the box mods and juice feeders have never appealed to me but I know they must work very good being as they have so many loyal users. I have tried most cartos and tanks on the market and these Riva-T's have impressed me. They work very good on my Riva SE 650 and my Indulgence V3. I have a VV Lavatube coming in the mail and I'm very curious to how they work at a little higher voltage. I also hear they are coming out with a LR Riva-t that I will be interested in trying.