I've tried most of the big boys over the past 20 years (WW, RSView32, RSView SE, Intellution, the old FactoryTalk, Onspec, Citech) and always come back to WW. The two deficiencies I don't like about WW in the past (can't speak for 10.0) is their ActiveX container and proprietary scripting language. RSView at least used VBA and had a better ActiveX environment. However, with that said, WW has proven to be more intuitive in development and more stable over the years vs the others.
And I agree....the licensesing is hands down the easiest to maintain (albeit the easiest to circumvent too).