Items arrived quickly. Upon payment a £25 postage charge was added, which was not shown when the standard postage option was selected. Also on a technical level, there is no real meaningful data on how the Osmio fluoride or charcoal filters actually perform, when compared with Berkey for example who provide detailed scientific lab testing results. When you pay £330 for a whole house filter, you really want that level of information and assurance, especially as we live in an age where 1 in 2 people are potentially going to be effected by a type of cancer in their lifetime.