I recommended the Zoom because the request was for a low cost unit with STORED PATCHES and as good as the Etap pedal from StanleyFX is, that isn't it as patches can't be stored and for some it can be fiddly. A programmable Etap2hw would be terrific, but I don't know the cost.
As for the Hall & Collins, it will cost almost five times that of the Zoom (£600) so I wouldn't say it was low cost.
That said, after hearing Charlie play some stuff at my request, I do hear something that I like a lot and if I were to try one with my backing or band and could hear that magic through the mix, I wouldn't hesitate to buy. It's obvious that Charlie is going to nail this first time because he doesn't want to be making adjustments afterwards, hence the time it's taken to develop.
But, this is a big but - unless the player puts in the input whilst playing the tunes and learns to set up his sound on guitar and amplifier, there will still be those who question whether the sound is right - or not. It is so easy to get it wrong by not listening and understanding the gear, we've all done it but some of us have learned. Charlie was using a home made Strat and a Fender amp and the tone and sound was exquisite ! I need a lay down thinking about it.