One thing I find is important with electronic cigarettes is consistency of quality. Vype does not offer good consistency in quality of their products. I find that some of the refills give no throat hit and burn out within a day of use whereas some refills are perfectly fine. The tips which do offer good quality I would give a five star rating however the inconsistency makes the product not worth the money, especially when half of the refills do not work properly. The general design of both the epen and estick are good and innovative and I would give a four star rating to that. The customer service is first class and vype have always offered me replacement refills for the ones which havnt worked however, for me, I should not need to worry about that. Overall the product is good when it works and customer service is excellent but the amount of faulty refills I have received has severely let down the entire experience for me and I shan't be continuing much longer with them unles I start receiving more consistent results. Sorry vype!