Unlikethe oppositions engine the Garret is modular and readily fixed if it does give trouble, generally TBO is 7000 hourswith Hot Section at 3500.
Speaks for itself really, the other air through the engine backwards is limited to aTBOat 3500 and Hots at 1000.
Never had a Garret give a moments worry in flight, can't say that for the other brand.
Parts are easy to get and there are a number of O'Haul shops approved in OZ.