Having done a fair amount of research on compost loos I came across Toilet Revolution. Patrick was very helpful in talking through the various options and the Biolan Eco was perfect for our situation. We have set up a glamping site on our farm and wanted loos that would not require an expensive septic tank. This model is robust and easy to install and I was impressed with the air extract system. Patrick put me in touch with an existing customer who had installed this model and any fears about odour were dispelled. I would highly recommend this product and company.