Haven't had DOI (that I know of) to compare, but I have to agree with this statement. It's an amazing experience, just not something to take if all you're after is euphoria. There are other drugs for that.
Personally I quite like complexity of LSD and you can relax into a euphoric-like state if you're in the right mindset.
Metallic tastes, sights, smells and thoughts are a feature of some trips for me.
Anyway, I agree with those here who say that flogging DOI off as LSD is pretty fucked. Flogging anything off as something else is not just a minor inconvenience, it can be downright dangerous.