Ben, never be worried about being critical of a product. You are the customer and are paying for the product, so you have a right to expect it to be as good as possible.
Regarding the Garritan instrument, whilst I find the technology very exciting and would like to be able to use it with my VSL sounds, the huge let down for me is the sound. As a violinist I will obviously be more critical of violin samples than I would of others, but I think that it sounds absolutely horrible. I've not heard the raw samples, so I don't know about their quality, but I suspect that some of what sounds so dreadful to me is caused by all the processing that is needed.
The fact that Herb has already mentioned the processing power needed to do xfade properly says to me that at least VSL is trying to come up with solutions. The power of modern CPUs is increasing at a tremendous rate at the moment, and it is possible that in the near future many of the things that we want will be realised. I have a huge list of things that are not good, don't work properly, need re-editing etc. with Vienna VI, but the only reason that I have such a list is that IMO there are no other products on the market that are of suffient quality to know where to start the list. [:D]
DG