We used the new custom "IFPA" Saturn bands (maroon) for our Suburban Shootout tourney over the weekend. (By the way, thanks, PPS for hooking us up on short-term notice!) Because this custom band version of Saturn bands are designed for competitive play, my review will be in that context.
For reference, I believe the hardness of the IFPA is supposed to be between #1 and #2. IFPA rubbers were installed on MET, ACDC, DW, and STTNG.
Summary: good, consistent feel. Made pins much more controllable, primarily due to the very high level of tackiness of the Saturn bands. Depending on the setup difficulty of your pins and the skill level of your players, you could be in for a long-playing tourney.
Details:
Bounciness -- they were definitely more bouncy than the typical blacks rubbers, but not nearly as bouncy as the red rubbers that were used at PAPA16. I liked the level of bounce for local competitive play, but might not be bouncy enough if your aim is to create a difficult set-up to challenge expert players and reduce ball time.
Tackiness -- Wow. You could rename these rubbers "Super-Grip" rubbers. Depending on your preference, this could be a good or a bad thing. Live catching was MUCH easier -- too easy IMHO -- with all the added grip. Post traps on a full speed inlane return were much easier. And opposite flipper "fluttering" to slow down a rolling ball on the opposing raised flipper to get a cradle was remarkably more effective. Last, the increased grip was noticeable enough to me that it felt like it significantly slowed down the ball on a high speed inlane return where you're wanting to hit the combo shot on the fly -- namely, hitting the R ramp on DW for Sonic Booms. The ball speed seemed to slow down considerably once it started rolling down the Saturn super-grip flipper.
Break-in -- bands were installed the evening prior when the pins were being set-up / tweaked / repaired. This was apparently enough play to break them in, as I saw no difference in flipper play from the 30 minutes of casual warm-up play on the pins prior to the event starting to the finals, which was around 6 hours later.
Durability -- no issues, but not necessarily a good test since it was just a one-day event with a relatively small player pool. I didn't check with the event host on audits to be able to detail exact # of games played.