After 4 months, 2 of 3 power strips defective

My first impression was positive at first, three months later, however, now appeared the first defect and after 4 months was the next power strip their minds on. The switch seems to work well is not as clean as it should. At the last turn on the power strip made sustained buzzing / scraping sound and the indicator light flickered. From this point, this occurred when switched on at the slightest touch of the switch on, and a short time later no ordinary operating longer possible. Since APC has no German branch, I returned the defective unit to Amazon. Now there's at least the purchase price.
Get me to replace but to order a device from another manufacturer.

Conclusion: As long as one is not pressed the switch all ok, otherwise better choose definitely another device !!