I brought my unit direct from Mobi for use around my yacht and was initially impressed with its usefulness. To keep things in perspective I think you have to consider it to be a portable hosepipe rather than a portable pressure washer as the cleaning power doesn't really compare to my mains powered pressure washer. Considering my Mobi receives very little use I would have expected it to last for years, however it is already experiencing problems that perhaps result from cheap construction. The water tank seal is next to useless and I now leave it permanently connected to the base to prevent it from leaking. The shoulder strap falls off all the time making it a real annoyance and more recently I have found that the pump runs continuously when the power is switched on rather than stopping and starting to maintain hose pressure - I have contacted Mobi and tried their suggested resolution several times as they said there was air in the system but it didn't resolve the problem. The second time I contacted them they didn't respond and the unit is now outside of the warranty period. After giving up on Mobi's support team I looked around for an alternative product and found the Nomad which is more expensive but in my opinion a far superior product. My Mobi has now been demoted to my scruffy backup for washing the dog !