Quail Eggs in my opinion taste pretty similar to the chicken eggs that most people are used to eating.
However Quail Eggs seem to have a much richer taste than chicken eggs but other than that Quail Eggs and Chicken Eggs have a pretty similar taste.
Quail Eggs have a bigger Yolk to White Ratio to them than Chicken Eggs which is probably why they taste a bit richer than Chicken Eggs.
If you like Chicken Eggs you'll probably like Quail Eggs too although Quail Eggs are a bit more expensive than Chicken Eggs.