Honestly, after using Farrow & Ball on about fifteen of my higher-end flips, the application is surprisingly smooth but you need their estate emulsion for walls and modern eggshell for trim work. The pigments definitely have this depth that makes buyers stop and stare--I've seen rooms feel completely different compared to standard Benjamin Moore or Sherwin Williams. The real headache is the cost since it's nearly double regular paint, but when I'm targeting that $400K+ market, those extra few hundred dollars usually come back as faster sales and better offers.
I personally do like Farrow & Ball paints in terms of application, I think they tend to go on well and provide a good quality look once dry. I also love their range of finishes, which are all suited to specific spots and can offer flexibility so you're finding exactly what you need no matter where you're painting. I've found the exterior masonry finish helpful, for instance, when painting exterior surfaces like brickwork that can otherwise be difficult to find a good finish for. I've had experience using their modern emulsion finish as well in high-moisture areas like kitchens and bathrooms, and found it holds up well in these spots. I wouldn't necessarily call their pigments superior across the board. I do think F&B tends to use high quality materials, so their paint does tend to be higher quality than cheaper brands. But, I've had equally good success using other high quality brands, and really the best pigment is going to be the one that works for your project. I do tend to think the higher price tag is worth it though, for F&B or any other quality paint.
Farrow & Ball paints are at least as wonderful as anything you could find anywhere in a field where the smallest details are important. Not only does it decorate the walls, it gives them life. It is like a dream and the perfect, almost magical finish, with Their Estate Emulsion creating an enveloping, soft, matte which envelops the room with the sense of warmth and with their Modern Eggshell on trim providing a veneer of light, a veneer of luxury, that elevates the whole ambience to the next level. With Farrow & Ball the colours are different. They do not leave any trace on the wall - they animate it. The colour is deep and richly alive with the light. The paint can actually tell you how it feels inside the room every single day, the paint changes colors, every day the paint is a different color and after you walk into the room you are different. Yes, Farrow & Ball, is no end. But for those knowledgable of the power of the environment surrounding them, the price is of little concern. Not only does it decorate, it transforms, and uses any space, wherever you are, to become a living breathing form of your being. This is not a unique case for me only. It is building for you a dwelling place, a dwelling place which speaks to your soul each time you turn the handle.