Utter *rap. If you want to spend 3 hours on a dyno repeating what hes done so often then you pay the money thats your option.
Have you had your bike done then? Ask them that have had it dynoed. Ask them what happened. Ask the result.
By all means if you have an 1100cc big cammed ported big valved singing and dancing hybrid, go for it.
Mickey mouse std 749 999? that all thats needed to get it right.