Most hot pot places are about the same because you cook the food yourself. You make your own dipping sauce. Since you cook things yourself, you can't complain about their chef's skills. So it boils down to their selection and quality of selection.
That said, I enjoyed Little Sheep a lot. Their selection is pretty standard. You can find all the usual meat/fish balls, veggies, beef/lamb slices. They also have unlimited soft drinks, soy milk, and plum juice which is a nice plus since not every store offers these for free.
The decor is nice and they use what I think is called a convection heater. Service is above average for an Asian place.
Price wise it's fair for an all you can eat place. $20 base, plus extra charge for soup base.
I would come again.