Which is better - Holiday Tender, or Floating Puck Dispenser?

It's really a user preference. Both do the same job and require the same user maintenance, ie. you have to ensure they are open 1 - 2 - or 3 slots. Note: The Holiday Tender slides into the Microfilter (Lily) basket rather than floating freely in the tub. Never mix Bromine with Chlorine pucks.