Stillpoint Ultras anyone?

I am about to buy the Ultra Minis. I had ordered them from Music Direct - whose website said "3-7" days before they shipped. 20 days later, they had still not shipped, so I cancelled the order.
I have had considerable experience with Goldmund Cones, Cerabases, Cerapucs, Cera anything you can name, and many other manufacturers devices. Shaktis, which go on top of things instead of under them work under the same principle, and that principle is this: placement is the b**** of all isolation devices. Tube traps are the same, and I've had them since ASC opened in 1984. If items are not precisely placed, you will think you have lost your marbles and be disappointed. NO. You must spend the time moving them around. And when you move ONE and it sounds very good, LEAVE IT ALONE and then work on the second isolation device until it improves something really well. Then go to the third. Once you have things properly placed, where they do the most good, you can get to excellent. Roy Gregoy has the same mindset about this. Tom Miiler, in one article in TAS, warned that, if you thought you were going to plunk down (I think it was the RoomTunes) the devices and they were going to work, you were sadly delusional. Everything has a point where it reaches 98% of its potential, and anywhere else it is only at 70, and that's where many people lose their joy - and hope.

gbmcleod, order the Stillpoints from The Cable Co. I got mine within days. I am using the Stillpoint Minis under my AC regenerator. I will add some to my CDP/DAC next. I also did a comparison between the Minis and Ultras and found no difference to my ears.

Gbmcleod, the magic of great realism in sound production is quite fragile as you suggest. However, it includes many things you don't mention such as the speakers, your position, whether the power cords are on the floor, whether the speaker wires and ics are close to power cords, etc. And there are limitations, of course, such as what others think of the system you have laid out. My wife said, "I'm tired of having a sound laboratory in my great room."

Presently, I am working with the room treatments which are so critical in my very small listening room in New Mexico. It is 10x13x8 feet. I found that one of my Zilplex resonators was one eighth of a inch lower than that on the other side and was moving the sound stage toward the other side. These things are very powerful although they are just one half inch in diameter silver bowls.

I should also say that seldom having the isolation devices in each of the four corners of a component is the best location for them. If you have great latitude for placement, put one under the main transformer. Trial and error is the only game in town.

I have Ultra Minis.
BY this time, Roy Gregory has weight in on The Audio Beat, a web magazine.He suggested line conditioner first, then amp, the preamp, the cd player, because, he says, power supplies generate tremendous noise and move them on into the components.
I put them under my ASL Hurricanes and heard a significant difference. However, it wasn't until the appeared under the Power Plant P300, that I truly "heard" them. Good Golly, Ms. Molly! The presentation came TO LIFE!!! Individual instruments, heretofore, playing along with a Geritol-type sameness, dynamically speaking, stood out as if they were doing solo turns. On the next Boxed set of Mecury Living Presence CDs, CD #23 with Farley, Grainger and someone else, and conducted by Fennell, it sounds as thought instruments are no longer playing in an auditorium with 100% humidity and 80% dew point. It's as though the dew point went down to 45 and the humidity 50. Subtle intstruments are obvious within the mix, ones that before you heard, but only has a "sound" never an instruments whose identity you could identify.
Nope. These are real deal.
Caveat: You MUST play with placement. A casual "lets-put-'em-here" toss will yield you less than stellar results. In fact, you'll wonder what all the fuss is about.

Gbmcleod, I find the use of SP Ultras, including the Minis varies greatly depending on the ac filter used. SP Ultra Minis could not be used under my HB Designs Acrylic PowerSlave as it isolation feet are too long and difficult to remove. I put two SP Ultra Fives under it, and it was a disaster. They robbed the sound of all dynamics, much like rubber and soft woods do.

I tried the Ultra Fives also under the High Fidelity Wave Guide unit on its rails and found no benefit, but directly under the unit worked quite well. I tried to use the Ultra Minis but it was just too precarious.

I have used SP Ultra SSs under several ac devices with great success. These include the Sound Application, the Synergistic Research Power Cell Mk I and Mk II.

I would imagine that the amount of vibrations allowed within the filter affects the effectiveness of the isolation feet.