Finished up my previous spindle of Verbatim +R DLs this weekend and ordered this one to finish up the job.Turns out it's a spindle of crap. First four are 100% coasters. 1st disk didn't error on burn, but doesn't produce anything useful. next 3 all errored during the burn. (quad core mac pro w/ stock superdrive) 8x, 6x, 4x, 2.x4 (slowest I can go) are all failures.Sigh.