I did my Color-shifting gold-pink-peach drops from PP over using the Shell colored Serafil from Pattye's shop.
Although white Power-Pro was *okay* for these, I like the shell colored thread better; it is a more homogeneous look up close.
Additionally, some of these drops had larger drill holes on one side and needed a larger knot. (I had rearranged the pearls from their original order, with the result that some of the formerly-end pearls with larger drill holes were no longer on the ends.)
Initially I had the impression that this thread made slightly bigger knots than Power Pro, but I have revised my opinion.
Also, because it is slippery, I found it fairly easy to make a
double knot (a.k.a. "jeweler's knot") wherever I needed a larger knot, which I had not been able to make with other threads without tangling. The double knot is an overhand knot made by simply passing the thread an additional time through the loop before tightening it. I did prefer to guide the knot close to the pearl with an awl when making the double knot, just to play it safe, to prevent a gap. It seated itself nicely when I pulled the 2 threads apart.
NOTE: If you expect to have to make many double knots, allow more thread! And be sure the knot is right next to the previous pearl before tightening it. I use an awl to drag it to the right spot, then tighten the knot around the awl and only then pull the two threads apart.