

Great
Low friction and heavy, perfect for tracks, and pieces too, but needs a fair bit of break in.
Angstrom Gravitas
This puzzle lubricant is amazing and works great in conjunction with Angstrom Dignitas. It really helps to control your puzzle and adds a nice feel when turning.
Great if you're not into the sticky feeling of 50k
I purchased this and Dignitas because I was constantly hearing Traxxas 50k being recommended as a Silicon lube over premium ones, however I was not particularly happy with the application process as well as the fact that initially you'd have to work the lube into a very sticky cube that was just painful to turn.
I couldn't be happier with them. While you still get a "slow" feeling at the very start, it's not quite "sticky" like 50k is. Applying with the applicator sticks is just plain easier, and it's going to go far enough that price is hardly a concern. (Seriously, this is in a day and age where people will pay $A100 for a cube, lube is well worth it.)