CarlI have used most of the beta's since around 10, including 20. I have not tried 21 yet but for all previous betas, running XPL has been a major problem. Some code will work but a lot will not. I am hopeful that this will change after NB10 exits the beta phase but at the moment they are concentrating on the core capabilities. Overall it appears to me to be a good looking product but I cannot use it for regular work because of the XPL problem.Best wishes Paul On 05/05/2014 16:23, Carl Distefano wrote:Quoth Harry Binswanger: I just tried the new beta (21) of NB 10 and very preliminary reaction is: WOW!Harry, I know it's early days, but what are your initial impressions about Beta 21's compatibility with, and stability when running, existing XPL code, especially U2?