Perfect replacement for the old energy guzzlers

Now I have already bought the lights once again. Not because that would already broke, but because the quality is really good, and after the death of other Old Bulbs purchase additional LED lamps were necessary. So slowly I have exchanged all old bulbs against these LED spotlights in my apartment and have to say much that I can not notice any difference to the old lamps. Now, after more than half a year I have to complain about not a single failure at 20 in operation lamps - the old non-LED lamps, however, are dying like flies.

Only at one point in my bathroom I have the problem that there is a lamp after a certain time (~ 10 minutes) begins to flicker, which eventually becomes so strong that one has the feeling of standing in a disco. I go, however believes that it is up to the electrical system at this point, because the directly surrounding lights are also affected to a lesser scale. According to Internet I need here a LED transformer or driver - unfortunately I have not found anything here that can show really good reviews.