Absolutely worth a try! The 96 series is of a very good quality and so I can only believe that the Shahi series is that bit better, as advertised. I have a number on my list, as it were: the Majmua No.1, Oudy Majmua, Musky Majmua, they also have a Darbar and a Shamama in the series.
I've been wearing Swiss Arabian's Majmoua Gold today (Champaca, Mitti, Amber, Saffron, Sandalwood & Agarwood) with bouk's Indian Black Musk (quite a spicy number, deep chocolate after an hour).
I've cleared out practically all of my cheapo early purchases and have consolidated my "little" stash into black musks, oudhs (of which I have a trio of quite expensive examples), vetiver, patchouli, amber, then we're onto Mukhallat Malaki & Hajar Aswad, Majmua, other good mukhallats, some Amouage clones and finally some florals.
Most definitely the Nemat Shahi series will be one of my next purchases ...