I was really curious about Spitfire Mural until I tried it out and I have some major problems with it. First of all there is the whole question of reverb: while the hall they recorded in sounds fantastic for certain slow moving passages and sustains, when playing legato it becomes obvious to my ears that you are playing samples with reverb on them. When you put reverb on a dry performance it smooths out the transitions in a natural and extremely helpful way. I usually use a combination of UAD Ocean Way Studios and a bigger reverb hall for this effect and it can work very well on drier string libraries. With mural it really feels like I'm playing a bunch of samples that already have reverb on them and it just doesn't sound natural to me.
Another problem is that some of the notes are pretty painfully out of tune. This isn't obvious at first but if you spend half an hour with it you will be able to hear what I'm talking about.
The noise on some samples builds up at the end - partly due to the fact that there is reverb on them and they needed to obviously keep that part of the sample - and it gets VERY noisy when listening in isolation to the point where you would have to do some very annoying work to them if you need them in isolation. It does NOT sound professional in that sense.
I will definitely be going with CineStrings at this point. The price is better and to me the philosophy of that library is much more practical. I also bought Cinesamples Upright Pianos recently and man they are incredible. The samples are clean and actually you can boost a sustained chord and it is very usable on its own - unlike their Piano in Blue which is sometimes a little too noisy (still better then Mural). The way it is laid out and sounds is just fantastic. I really like CineSamples stuff and recommend it. I haven't tried out CineStrings in a while though and really really wish these companies offered a way to demo their products...
That is why I'm writing this though! You won't find that many people complaining or pointing out the negatives other then - that sounds like ****! That is not helpful. I gave 3 reasons why I would definitely not buy Spitfire Mural unless I really needed something with that particular reverb sound and had other libraries already.
Hmmm. Why are you comparing piano libraries from Cinesamples to Mural from Spitfire? Are you from Cinesamples?
First of all, I'm kind of questioning whether or not you know how to use the library. I have a lot of the "free" libraries from Spitfire, and even they are extremely useful and very organic and real sounding (especially the mini harp, scary strings, and soft piano). I do own EDNA and find the library immense and creative, and have gotten a lot of compliments on the sound when using the library in works. I cannot comment on any of their full orchestral libraries. The demos make my mouth water though. Now that you mention Cinesamples, I have paid quite a bit of money on their libraries, including their Percussion library Drums of War and Orchestrator tool CineOrch. I have not been that impressed, especially with their percussion stuff. Drums of War is way overpriced --there is hardly anything to it. Worth more like 20USD, not 100USD. CineOrch, similarly has barely anything to it, which makes its utilization limited --though it does sound decent. I don't know, from demos and personal experience I think I'm going to lean towards Spitfire and attribute your review with user error.