On the Danube right now using Uniworld and just returned to the ship from a fabulous day trip that only Uniworld visit. It was very special and in an area inundated with tourists, that means a tremendous amount to me. I’ve had the opportunity to talk to some fellow travelers who are American or Canadian and they all say they prefer Uniworld over other lines as they have the best tour guides (certainly so far we have had experienced absolutely amazing guides), all inclusive pricing, excellent tours, quality food and wines and no tipping, which makes life easier for them due to all the different currencies that would be required on this trip in particular.
I agree, but as I said in an earlier post, do your own research and discover which line is right for you. Think of your priorities, listen to lots of opinions, not just one. I’ve certainly seen a few ships that I wouldn’t go on if you paid me, but here is not the place to name and shame. Each to their own.