I purchased two bottles of ZIIP Silver Gel serum which is my favourite of the the three gels. I have very sensitive skin and an allergic reaction to products containing Niacinamide so the silver gel is the best choice for such issues plus skin feels lovely after use. I tend to just rinse off any excess gel then apply my night skincare regime, perfect for me.
The price I purchased the two gels for was great and delivery to EU was super fast. Very happy with my purchase.