I've had it less than a week but so far so good. Very easy to set up and I get a lot more out of my 1-85w panel than with a standard charge controller. I will be getting more panels in the near future so I wanted to switch to MPPT. I highly recommend purchasing the Remote Meter MT-50 that comes with the kit I purchased. It offers more information and is also easier to read. I only deducted 1 star because the main display has no contrast adjustment and is difficult to read at some angles. The MT-50 has a much better display and is easier to read.