Bests & Worsts Reviews from Amazon

I have 2 tankless water heaters in my house (one on each end of the house). I added a 6 gallon tank to one of them to see if it would allow me to get hot water faster while the tankless water heater starts to heat up. I purchased an A.O.Smith for this and it worked great. For 4 years it has plugged away and I've never thought about it for a second. I've never had to touch it even one time so it's covered in dust and spider webs. I love it. Two years later, I asked the plumber to put the exact same water tank into my house on the other tankless water heater. Instead, he installed this one by Ariston (Bosch). After I saw what he did, I told him this wasn't the same brand, but he assured me that this was far better. It was *NOT* better. From the very beginning, the thermostat circuit kept triggering and shutting off because it said the water was too hot. Even when I turned it down to a very low temperature, it kept triggering. I would have to run down the basement and reset the tank. After many months of this and calls to the plumber, he told me to call their customer service line. Ariston (owned by Bosch) sent me a new thermostat and told me to install it. I installed it with some difficulty because the instructions on how to do this were terribile. It fixed the problem for about 6 months, then it started triggering again. At first occasionally. Now it triggers every day. I get lots of exercise running the stairs. I assure you that I'm monkeying with this thing so much that it doesn't have any dust or spider webs on it. It's squeaky clean. I called tech support and asked for a new thermostat again. They told me that my warranty expired and I was on my own. The guy on the phone, Scott, was rude and condescending. His "help" to me consisted of accusing me of not reading the manual and not using the unit as described. He spent about 30 minutes on the phone being rude, interrupting me, and being sarcastic. I try to be polite with customer service and tech support so I did not reciprocate as Scott seemed to want to draw me into an argument. This is the kind of person that they hire for customer service??? Finally, Scott said that I was going to have to remove the unit from the wall, drain the water, pull out the heating coil and examine it for damage. I explained to Scott that I am not a plumber and I didn't feel comfortable unbolting a water heater from the wall, draining it, and disassembling it. Also, I said that even if I did that then I wouldn't know what a bad heating unit even looked like. I asked him if Ariston would reimburse me for the cost of hiring a plumber to do this and he said that they would not. I then told him that I was going to have the unit replace with an A.O.Smith brand like I have on the other side of the house and that I would write a bad review on Amazon and Angie's List. Here it is. From the other reviews that I have read on Amazon, others find this to be a good water tank. But it seems like I got a lemon. Ariston customer service did not stand behind the product or try to help me out. Instead, they were rude and confrontational. When I purchase a product like this, I don't expect to spend the rest of my life babysitting it. I just want to buy it, install it, and then forget that it even exists. This is not such a water heater. Also, if I end up with a lemon, I want the company to realize that those things will happen occasionally and stand behind the product and help fix the situaiton. This was not my experience. This was terrible customer service. Please do yourself a favor and get a different brand.