Bests & Worsts Reviews from Amazon

I really think this is a 5 star product and I was ready to give it 5 stars and explanation follows. Received the product timely and all parts were present. Installation is very easy if you follow the included instructions and photos. The most important part is making sure the terminal block screws are screwed down tightly on the stripped wires. The stripped wire end will typically be multistrand copper wires and after stripping the wire ends, insert into the terminal block and tightly screw down. Wait about 5-10 minutes and re-tighten the screws as the wire strands will deform. I learned this trick from an electrician. After installation and confirming fully functioning unit, I thought I would get on the Progressive Industries website to see if I needed to register my unit to maintain warranty. I read through the warranty and here is the copied statement under voided warranties section: " Installation of hard wired units by any party other than a qualified RV dealer" I then e-mailed them asking about this and their reply was confirmation of voided warranty on self installation. So, if you are a "Qualified RV dealer", you have lifetime warranty but if you are a DIYer or even a qualified licensed electrician who happens to not be a "Qualified RV dealer", then the lifetime warranty is void. Given that, why is this product available for sale on Amazon without a warning? While I do not believe that I will have problems with this item, and I feel competent with my installation and that "qualified RV Dealers" does not necessarily mean competent RV Dealers (I have had my share of work done by "Qualified RV Dealers") I am disappointed by the Warranty restrictions. 6/5/2018: I have been notified by recent purchasers of the EMS-HW30C that PI now will provide Limited Lifetime warranty on this product even with self install!! This is great news and I will revise my review with 5 stars. Proper preparation and installation is still a caveat.