I put in a new kitchen 18 months ago, and went for LED tape lighting, under and over the wall units.
Having researched the market, I avoided the cheapo stuff you can get off eBay and went for what my local electrical supplier recommended - from TLS.
It was maybe 3x the price that I could have paid, but it was dead easy to cut to the lengths I wanted, solder on new terminals and fit, it's stayed put (self adhesive tape) and not one LED has failed. I'm really pleased.
This really is a case of paying as much as you can afford for well made, reliable kit.