"First time right is a rare case" NOT
" it seems having a beautifully done counter top for the first time is a rare case."
I disagree. With a competent fabricator you should know what to expect and get it. We do many hundreds of jobs per year and only have a handful that have unsatisfied customers.
1/2 of those are due to irrational people that no one can make happy or people that choose not to listen to the stone guys advice (like "don't use limestone for kitchen countertops") and then are unhappy with their new tops. On occasion we make mistakes and then we fix them.