I had massive problems with the SD slot in my Pi. Normal SD card inserted because so relaxed in there, that there were loose contacts repeatedly - then is the whole Pi or makes any botch. Since then I have this adapter in it, the problems are gone. He's quite tight, but not too tight. Reworking I did not have. Therefore, full marks. The only problem: The adapter is (systemic) thicker than an SD card. I have my Pi in a housing (TEK-BERRY), where there was no room down. In this case, reworking is necessary on the housing.
[Edit] The reworking of housing is now completed (see pictures). This means that the Micro-SD can be found even with the housing closed.