Lots of guys are changing to it on the GWRRA board. Many like myself have been using red cap for many years and miles.
I changed to it on the last change. I have about 400 miles on it and the shifting is as smooth or smoother than it was with the red cap. So far I am planning to use it for the colder months but I might make it me regular oil if I stay happy with it.
Quite a few riders are changing over to the Rotella T, a very good quality oil for a very reasonable price, and the gallon container is perfect for our Wings. In addition, Shell recommends Rotella T for motorcycles.
Here's an article from Shell about using Rotella T in motorcycles.
Have used Rotella-T for the past 32K miles. Bike runs great and shifts like silk. Does not use any oil between 4K miles changes. Also use Honda oil filters. Like the price, where you can purchase it and the 4 qts. which is ideal for the GL1800.