The pants are both great and terrible:
1) the great: this is a fabulous and inexpensive way to find out your true pants measurements. You need a bit of patience but you will end up with a perfectly fitting pair of pants
2) the terrible: at least when I was using them 2 years ago (at the start of my bespoke odyssey) the fabric was hideous by any standard.
So far as construction, they are nothing special, but perfectly adequate.
When I had perfectly fitting pants, I sent a pair (of course they meant nothing to me so I did not mind if they were damaged or lost) to a famous trousers maker in Naples, and he made me several pairs of the most beautiful pants I have ever seen in the world, without exception. True story.