Let me skip the intro on GR, but how useful is GR? 1. The extreme approximate calculations gave a result which roughly matched with the Mercury Precession. I am not sure, I will cross check and revert, but why there is no news about precession of other planets or systems? GR figures do not match there ? Precession of Mercury some few arc seconds in a century, is not of much use for us. 2. Deflection of light by an Object : This also matches with some uncertainty with observed deflection around Sun. But there are still some issues with Gravitational Lensing Images in certain cases. Mass and mass profile of many galaxies or big objects is not known to a very accurate level, so these deflections figures are a kind of you-help-me-I-help-you. 3. GPS : Everyone is fed that GR plays a massive role in GPS calculations. There are two questions, Does it really play any role or every one is blindly taken for ride? The second question is no other alternative to GR can help in GR calculations. Is it really desirable to keep the GR in such high esteem with Black holes, Dark Energy and dark matter around it, the problem list contents much more than 3 points, so what is the truth? Should we embark on a journey to find the truth about GR?