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I have used them. Yes they give good service. 
But they have to.! They obviously supply industry as their main client base who will often need bearings uber pronto. If they did not give good service they would not be in business for very long in such an industry.
I did need some Timkin headstock bearings a while ago. They had them in stock for delivery the next day but were nearly twice the price of 123 bearings that had them in stock in a branch in France. Delivery as such was about a week from them. As these were not cheap items I waited a week. – Others may not have been able to afford that weeks delay if it was for a vital and needed machine.
Nick