Quite simply, the East West Symphonic Instrument - Gold Package, sounds absolutely amazing. I have a few virtual instruments in this category, and this one completely blew me away. The sounds are incredibly realistic and the instrument choices and articulations are huge. It is a beautiful piece of software.
Do not be discouraged by the reviews that speak about installation issues. Just make sure that your system meets the system requirements. Mine did, and I had no trouble with installation. Be aware that the installation process is long, simply because you receive five 8 GB installation DVDs. Each one takes about 35-45 minutes to download, but it is well worth the wait.
The reason that the software comes with a note that says that the DVDs are out of date, is simply because they want you to have the most current "PLAY" engine, so that you get the best experience and so that it works with most current DAWs (Including Protools 11). Most of the data on the DVDs is from the sound libraries, they are not out of date. It's just the PLAY engine portion that needs to be most current. At the end of the installation, the system guides you through downloading this part, and also goes through the authorizing process and the linking to iLOK. My installation was long (2 1/2 hours), but seamless. Just get a cup of coffee, take it slow, follow the screens and just let it do its thing. MIne worked 100%, no issues.
If you persevere through the installation process, you will be extremely pleased with the quality of the sounds, and the quantity of choices. I am 100% satisfied with the GOLD version, and enjoy working with it. Just read the instructions, watch the online tutorials, and enjoy. It is really excellent. Don't be expecting a 5 minute installation and a 20 page instruction manual. This is a quality piece of software that requires a little bit of focus on your part. It is not difficult, but you need to read the instructions carefully before jumping into the installation and using it. It's well worth it.