Great customer service!!
After about 3 month of use my PH 55 started to give me a little trouble. I could no longer calibrate the meter. I called Milwaukee and told them what was going on with the meter. After some Q&A they determand that the probe had become clogged with nutrient salts and the probe would have to be replaced. They sent me a new probe free of charge. Also they gave me some tips on how to prevent it from  happening again. The people at Milwaukee were frendly and very helpful. If this meter were more expensive I would have only given 3 stars. You get what you pay for, and for the price It's OK!!
Rating: 4 stars