Are the procomp 6AL's any good?

hey there, i ran a 6al copy in my 440,same wiring diagram on back, same colour etc.even put on mates boss mustang....great spark etc.HOWEVER....i got a second hand msd and fitted that and happy with it, guess its the usual " if its so cheep why scenario" my dizzy is single points type and just triggers the msd, if my msd ever dies with a by the roadside couple of wires i can do away with msd and run home on my points......:cheers: