We have had our 5000 now for about 2 years. So far it has performed very well. Like everything else you have to perform maintenance regularly, mainly for us it has been blowing the unit out with pressurized air after every job to get rid of excess powder off of sensors. Replaced 2 table sensors also. We demoed a Standard unit and the 5000 before purchase both seemed adequate to do the job but the thing we did not like about standard was the power requirements. As I recall it required 2 or 3, 220V hookups as the Duplo only requires 110V. Cant speak for the perfomance of the Standard, but as for the Dup[o, we are very happy with it and plan on adding another tower in the near future.