Good Presi money - quality well

I bought the pack to illuminate a bathroom with 6 spots.
The light distribution is great, there is plenty of diffused light to the space available and the light impression fits perfectly. One of the 6 built-in LED lamps began however after 3 days to flicker. Therefore had the same time replace this bulb. Since then, the lights running. (About 2 weeks now)
Well - used 6 lamps, a shortly thereafter unusable. Luckily I still have 3 more bulbs in reserve for this bathroom. But quality has not really convinced me.
The value for money is good, but I'm curious how long do the lamps really.