Well I got my TI-100 feet from PartsExpress today and I promised I would post some feedback but before I do, since everyone has variations in their setup I thought I would tell you about mine first. My theater is in my basement, it has a concrete slab floor with low pile carpeting and heavy duty padding. I do not have theater seats, instead I have two Sealy love seats and a couch, low back, heavily stuffed and leather covered, the love seats are the first and third rows and the couch is in the middle. The second and third rows are on a riser built from 3/4 in MDF and 2x4's, graduated at 5 and 10 inches respectively and covered with the same carpet as the floor. I have four Clark transducers, two gold (one in each love seat) and two silver (both mounted in the couch) and they are powered by two Sony 100W Receivers.
The isolators are just large rubber cups with a mounting screw and washer for attaching to the existing feet on the furniture and add about an inch to the overall height after installation. I needed 14 for my installation and the total cost with shipping was a little over $40.
Now for the review, for my setup I noticed a very good improvement in the amount of motion and had to turn my shaker amps down a bit which resulted in a little less background shaking from extraneous signals without a decrease in the oomph of those Dino steps or depth charge explosions which I felt resulted in an overall better impact, IMHO for about $10 a chair this is a worthwhile investment for those that want to squeak out that last little bit from their shakers
Tom