Hi R4ix, sorry I've only just seen this, in answer to the question, no I'm not and if I where then I'd be very clear about it as that'd be a bit weird otherwise.
Compliments related to the printing are based on the results of a large number of hours of printing with it compared to a similar amount with the original head (mount changed back and forth a few times to see if i could fit bigger fans on it). That said its not a scientific study. I like it, in comparison to what I've experienced previously and have said so - but obviously that's a subjective opinion which can differ from person to person.
Equally the customer service bit is based on the experience of it, and this was good to - and as this is something I value highly in companies, mostly as its less common in the UK than could be hoped, I thought I'd comment on my opinion of it as well.
Hahaha on re-reading the original post it does sound a bit like a hammy work placement student has tried to write an advert, I think my cheese filter must have been set to off !
However, cheddar aside, I think it reflects the concerns I had going into fitting the thing - "will it work, oh god there's soldering and firmware updates argh!" and so on. It was really good that none of those thing turned out to be horribly difficult.
TBH if i though the head only matched the UM:O i'd probably still go for it as its not very pricey especially compared to the UM official gear - delivery is a pain!
This might be a really dumb question but you mentioned going from ABS to PLA and having clogging issues - is it purging completely - have you tried doing this with the isolator fan off to allow it to clear residue that is normally outside the melt zone?
I'm mostly using faberdashery and UM plastic so I've not had to much of an issue with inconsistent diameter to deal with - is the clog/jam defiantly occurring in the hot end? Sorry if that's a bit teaching grandmother to suck eggs, I'm just thinking through the things I'd check if I where having a similar issue.