I am writing this review to express my deep disappointment with the Philips Sonicare DiamondClean Sonic electric toothbrushes that I have purchased over the years and the subsequent customer service- or lack of it. Unfortunately, my experience with these toothbrushes has been consistently frustrating, marked by persistent failures and a lack of satisfactory customer support.From the initial purchase in 2016 to subsequent models bought as gifts and replacements, each Philips Sonicare toothbrush I have owned has encountered significant issues. What is particularly concerning is the recurring pattern where every toothbrush has failed around the two-year mark. These failures include motor malfunctions, loose top sections, reduced cleaning functionality, and a notable decline in power. It is disheartening to see such consistent problems across different models, indicating a larger underlying flaw in their design or quality control.Considering the reputation of Philips as a leading brand in oral care, I had expected their Sonicare toothbrushes to be reliable and long-lasting. However, the reality has been far from this expectation. The consistent failures I have experienced with each toothbrush undermine the brand's claims of excellence and durability.In an attempt to address these issues, I reached out to Philips seeking assistance and resolution. Unfortunately, my efforts were met with complete silence and a lack of acknowledgement from the company. The absence of proper customer support only adds to the disappointment and raises questions about Philips' commitment to addressing customer concerns - as is clear looking at other reviews.Based on my experiences with the persistent faults and the inadequate customer support from Philips, I strongly advise against purchasing their Sonicare toothbrushes and indeed using Philips for any product purchases. The unreliability and consistent failures I have encountered, occurring predictably around the two-year mark, make these toothbrushes an unreliable choice for anyone seeking a dependable oral care product.