I think the easy Killers are actually easy, and this one is easier than most puzzles rated easy. But most easy ones are very similar, and take some minutes to solve for me (5-10 minutes normally I think).
Based on my method that makes this puzzle look very easy, as I had said before. I thought it might be of some interest to compare it to a difficult puzzle.
I found this puzzle to be quite easy.
This puzzle actually needn't be a killer sudoku puzzle at all since it is solvable as any ordinary 9x9 calcudoku puzzle.
As a plain calcudoku puzzle (where there are no box constraints and values can repeat within cages), it made an excellent puzzle which was quite enjoyable to solve. In this context I think it would make it into the difficult section, but it is still easier than either the harder 9x9 puzzles that we get on a regular basis or the Friday killers..