Which timing light should I buy?

This is the review that concerns me the most as I need it to work with a 7 AL-2 MSD box.

My wife purchased this Timing Light for me as a Christmas gift and it has some of the nicest features you could imagine. Only one problem though, it does not function with any vehicle that has an aftermarket MSD or Mallory ignition system installed. It functions sporadically when these type of ignition system are installed on your vehicle and the MSD website confirms this as well. Many timing lights have trouble reading the MSD's capacitive discharge multiple sparks. Dial back timing lights are not recommended either.

Very disappointing that I must send back this full featured Timing Light because it simply does not work with MSD (Multiple Spark Discharge) ignition systems.