I only used it once along with the wand but found it difficult to apply as it was drippy and not as lubricating as the gel used in my PT’s office. It was not irritating and I trust it is safe hence two stars.
The product is so watery and the silicone items are so hydrophobic that the lubricant just rolls off the silicone items. What little watery lubricant that stays on the silicone tools, my body absorbs and removing the tools is painful due to lack of remaining lubricant. This lubricant is not well formulated to use with the silicone products. A much more viscous product is needed in order for the silicone to retain the lubricant. I am sorry I wasted my money on this expensive product.