i have one too and like it. Wash in warm water as suggested in the instructions and it will not move or need to be taped down.

I use ArmorAll on my sewing table and it works great for me. I finally learned to spray it on a cloth instead of the table so the floor isn't so slick that I fall down. Ask me how I found that one out

I also have sewed mine to the quilt - not fun. I also was thinking of using an oven mat. Haven't done anymore fmq since then but would like to try it.

The slider supreme tears easily if it gets a little hole in it, but I use it because it grips very tightly, my machine has a removable table which has to be removed to change the bobbin. Too much work if I had to tape it down.

I just bought a silicone slider mat online. ( 12 x 17 inch) It looks just like the Teflon oven liner. It was around $12-$13 as oppose to much more expensive " Supreme Slider. I figured if I screw it up then I would not have wasted so much money. Have not tried it yet but will use a practice sandwich to see. When I tried w/out any slider the fabric did not move very well and was quite flimsy. Maybe the batting (Pellon Crafting ) was too skinny. I had feed dogs left up as Leah Day suggests . Its just seemed like there was too much grip. I have a newer Babylock Melody and wonder if FMQ works better on vintage machines.

I just tried a little experiment yesterday. I've been using the supreme slider since I started learning FMQ. I've mainly followed Leah Day's ideas and like her approach. Yesterday I was almost finished with the quilting on a new quilt and ran out of bobbin thread. And I have to remove everything to reach the bobbin on my Pfaff. Decided to try not using the slider for the last bit and I could tell quite a difference. The stitches were more jerky and moving for the curves was more difficult, so I'll be staying with my slider. I do need to remember to wash it though as I do have to tape it down now. Don't think I did when it was new. As for leaving feed dogs up, my Pfaff will not do free motion until feed dogs are down.

I've never used one, read about too many on here sewing them to their quilts! I just clear off my cutting table, pull it up to my left and use it to support the bulk/weight of the quilt, and this helps a lot.

No luck with slider
 

Ive used two Supreme Sliders & had no luck at all. I sewed them to my quilt. Ripped holes in them. I've taped them down but quilt catches edge of tape so slider is all over the place. I finally gave up & don't use anything. I didn't want to use sprays because I didn't want it on my quilt.

sassysews2- Just wondering how big to cut the center hole. Should it be the square of the full bobbin plate size or just the size of the walking foot tip or even smaller. I don't want to sew it to the fabric as some have mentioned.

Ukdame,
The hole on the Supreme Slider is only wide enough for the needle itself (that small space where the needle reaches down into the bobbin compartment (maybe 1cm x 1cm) It should cover up most of your needle plate & everything else on the base of your machine.

I will add that you also need to consider friction on the surrounding surfaces supporting your quilt -- especially if your machine is not sunken or surrounded by an extension table. I made my own DIY extension table with Whitman's Chocolate Boxes (it was a sacrifice to have to eat all those chocolates -- but it was worth it to further my contributions to the world of quilting ;). I just put them solid side up & taped them with masking tape to the bed of my machine (under the Supreme Slider).

I also found that putting my machine on a slight tilt (many people use doorstops; I just grab a roll or two of masking tape and tuck them under the back edges of my machine) helps the quilt move more smoothly. Probably part of that is that I can actually see better.