This replica of ceramic Ingenieur is not very accurate. Look for the reasons given above. I think you can't go wrong with these models:
Ingenieur AMG Ti Chrono/non Chrono
Ingenieur SS Chrono/non Chrono
I was torn between all these models. All has their unique flaws so I settled with 3 of them and start modifying them.
Firstly on all AMG rep, the caseback is not really 1:1. You can see the genuine has much better finishing. The Ti feels slightly different too. The genuine has a much finer finishing. On the chronograph models, you have to deal with dodgy Asian 7750 with running second at 6. So if reliability tops your list, go for non chrono version. The non chrono version suffers from slightly wrong datefont and short minute hand. Apart from that, none of the caseback looks 1:1 to original. The Co. on SS model is wrong and again the Ti AMG models suffers from slightly less detailed caseback.
The bottom line if you go for one of these, get a double sided AR coating. It makes a huge difference. Watch out for dodgy bracelet too. I have seen recent SS bracelet on this Ingenieur is not as well made as the older first generation.