I wore my slip on 4-5 days a week and after wearing them for a month, the knit started pilling. I have only hand washed them once with nothing else but my hands, mild hand soap and water. The shoes was 100% waterproof at first and I could wear them under the rain or walk with snow and still have dry feet, however when the knit started pilling a lot, that particular area will get damp/wet after walking in puddle. It is quite a shame because I get so many compliments on that shoes and I love the design - I find it very stylish! It is very comfortable for light activity, but would not recommend to wear it for high intensity workout (not enough support) or heavy weightlifting (too soft, feet can't feel the ground and distribute your weight evenly).
After talking to the customer service for a few days, they thought it is a defected pair and agreed to send me a replacement pair. As it takes long time(1 month +) for their shoes to arrive in my country (New Zealand) and I would very much like to avoid to have issues with the Everyday Slip On again, I requested Vessi to send me a pair of Everyday as I have a pair of that and although I have only worn it 3 times, I have no issue with it so far. I will do another thorough review on the Everyday after I have worn it for 1-2 months.