If you use the search feature you will find many a threads on these and other drum mic packages. I think the general consensus is usually as follows:
"You get what you pay for"
"Upgrade the bass drum mic"
"They're not bad...I still use some of them..."
"Theyre awesome for the price"
"Dont buy them...get these instead....*suggestion*"
at any rate - do a search for the specific mics and ye shall find what thoust seeketh.