Mainly logical. Just had an odd guess. Thanks.

Assuming symmetry at the start, then proceeded logically and then required guessing in the end again.

(Hint: At the start assume symmetry on the sides)

It did take some guessing along the way, but as a relative beginner I was still able to solve it. Still enjoyable, Thanks.

The start is difficult. Begin with R2 by eliminating some of the squares the 11 can't be in because of the 5 and 4 in R3. That should get you going on the outline. Even then, the middle takes some extra thought. Definitely more than a three-star difficulty, but no guessing needed.

Very good.

In the beginning some temporaries are needed. After that it is pretty easy, but sadly in the end there is quite a lot guessing. :(

One unique solution. Thank you for the puzzle.

Completely logical. use temps if you get stuck.