When it comes down to it, I reckon every place can do the intricate detailed work. Just some places feel they have to compete on price. Or at least, the customer is on a budget, or wants the lowest price.
My right arm has the Koi/Dragon sleeve, and I told the guys I didnt care how many sessions it took, or how much it cost. Just make it detailed. 24 sessions all up (1-2 hours each, over 14 months). But every scale is 2-3 different colours blended, and every bit of water is made up of four colours blended. The water then blends into fire. The tiger on my inner arm has fur which is made up of four colours.
Lots of it was done with a pure white base, then coloured over to bring out the colour more, etc etc. Was a pain in the arse going in for only an hour every second week, but at the same time it was affordable to do it like that. Took forever, but will last even longer.
Worst part is the elbow. Ouch. Had to do it twice cause it didnt take the first time.