I did, a 2013 R6L back in Jan 2014. I wasn't planning on getting another spa so soon. I recently had the opportunity to try out Microsilk and found that it helps my eczema so it was a huge incentive for me to get a spa with it. I had heard about it before (but after I bought my Bullfrog) and didn't really look into it as said wasn't in the market for one. It all worked out in the end, I was able to sell my Bullfrog and my Marquis dealer had a 2016 Spirit with Microsilk on close out price.