I got it and so far encountered no major issues. Game was crashing after one update and friend had some FPS issues even though PC specs were good, but all was resolved with rolling back to previous update.
In game shop is basically paying for cheats so completely unnecessary. Only consumables from the DLC are valid for one save, weapons should carry over to other saves. I got it in Day One edition but sort of forgot about it and didn't retrieve the items yet, so i'd say that's unnecessary aswel.
From my point of view its a solid sequel to Human Revolution and a game worth its cost. Being from Prague i might be slightly biased though