They are generally a bit hit and miss. But the ones that are good are very good. I have a full bottle of Ozone and 10mls of Smoulder, Tabac and Oud.
Ozone is nice and easy to wear - a bit like a cross between Creed Virgin Island Water and PDM Layton. Tabac and Oud are both very nice in their own right but perhaps not so easy to wear casually. The new one Smoulder I haven't spent much time with, but initial impressions are that's it's just OK. When I bought Smoulder he sent me 4 samples. Homme, Hazy Blue and Santal Extreme are all fairly forgettable but there was one called Notorious which is excellent. Similar to Initio Side Effect, so I will pick up a 10ml of that soon, or maybe even a full bottle.
Generally, although none of them are clones, I do think most of his stuff reminds me of fragrances I have smelt elsewhere. I will say the performance of everything is incredible though. Long lasting and lots of projection.