I fitted the Sun Mar Excel NE in to a shepherd’s hut and it was used by guests from March – November, mainly on weekends except in July, August & Sept when it was used a lot more, perhaps 75% of the week. I found the toilet very easy to fit by following the instructions supplied with it and on the website. It is definitely a learning curve achieving the correct mixture for the compost, and I’m not sure that I have yet managed it.  The basic mixture had to be adjusted to accommodate our climate. The unit, even in the heat of the mid summer, did NOT smell at all, and overall I am really very, very pleased with it.  Like anything new, it will take time for me to use it to the best of it’s abilities.  My lack of knowledge has been supported brilliantly by Patrick at Toilet Revolution, who takes the time to address any concerns.  If I was asked about recommending Sun Mar Excel NE to other potential users, I definitely would recommend it, with the caveat that you must be patient to learn about how best to make it work and not be afraid to try out different solutions.