Things I liked: These are inexpensive, good quality BBs. I use them all the time for outdoor matches. They carry far, and buck the wind better than the .20 gram varieties. It works well in my various rifles, and does a decent job in the MP5k clones. You lose some velocity with the added weight, but I feel that the added range and accuracy more than make up for it.
Things I would have changed: The bottle is nice for reloading at the bench, but it is very noisy if you try to take it with you into the field.