How do the various slide printers stack up for use with Polaroid 669 film?

I hear a lot about using the Daylab and Vivitar units but much less about the Sunpak unit. Are there others as well?

I just recently acquired a Sunpak unit which seems to be in great operating condition. It has a zoom and a fold out projection screen. I intend to use it for my first try at emulsion lifts and transfers.

I have two main questions...

1. Will my Sunpak provide as good (or better) results than the Daylab and Vivitar units?

2. Do any of you have experience with the Sunpak unit and/or can point me to someone or some literature that can provide me some advice in getting started.