For myself, I use OneStep Fineline for virtually everything, synthetic as well as wool. I've used Solutions No2 and found it excellent, and wouldn't like to say if it's better or worse than other brands as I can't honestly tell. But for the way I work with my equipment, I get on better with the OneStep Fineline rather than Solutions No.4. I feel again that the cleaning performance is inseperable, but the agitation is easier with Fineline for me with my equipment.
For my approach to business, I find what works for me then charge accordingly, so cost isn't an important factor and chemical costs within our sector of the industry is very low anyway. Plus I don't pay list price for my goods. As for micro splitting spotters, I think Eco Spotter is really rather good. Or should I say superbly fantastic. So is the No3 sample I have but, to be honest with Eco. to hand there is little need for No3 if I use my own 1:3 regular spotting mix. As for service, who's the best? Wouldn't like to say except that if everyone offered the same standard asmy suppliers and Solutions UK there would never be any complaints

Safe and happy cleaning:)
Ken