This is the best all-round lube I have ever found. Entirely water-based, it can be "re-activated" once applied with a small amount of water or saliva, but also rinses clean without leaving a residue. It has almost as much staying power as a hybrid lube, but without the small amount of silicone present in long-lasting hybrid lubes like Sliquid Silk. Silicone in a lubricant, even a small amount, can break down silicone toys over time; no such worries with Sassy!
Sassy does, however, contain cellulose from cotton plants. This is added to thicken the lube and make it slightly more viscous, so it stays in place rather than dribbling, and also does not absorb quite as quickly. But this also means that Sassy expires faster. I bought two varieties, Sassy, and the basic sliquid (which contains no cellulose), kept its consistency, but after a long time what was left of the Sassy had turned into very thin liquid, much less viscous than before.
So my overall advice is buy Sassy, but don't buy a large amount at once unless lube is something you use a lot of. Buy a smaller bottle to be sure it all gets used before it loses its consistency.