I've long wanted a model R/C excavator that accurately mimicked the actual control pattern used in real excavators and, finally, with HuiNa I've found it; proper ISO controls!
When selecting a machine from their range, as they have several ostensibly similar offerings, I did a little research - the 1580 would be the ideal, being all metal, but more expensive than I really wanted, whereas the 1592 appeared more toy like and jerky in movement, the 1593, however, fills the "Goldilocks" zone, offering the smooth, compound action of the high-end model at a much more realistic price point, (and it's worth noting that RC Geeks list it at a decent saving over some other outlets).
I don't really have any criticism of the product itself, the controls are quite sensitive but I suspect experience will take care of that, otherwise it was a painless transaction being delivered quickly without issue, (though it would have been nice to cut out the middle man and collect it in person as I'm impatient & don't live that far away from them!). Next step will be trying it outside in a sand box etc. as moving Lego around the living room floor isn't quite the challenge it was built for.