Quoted from Flex_in_Aus:

Yeah this was a game changer for me. Just when I thought I had seen all this machine had to offer I watched a tutorial (thanks heaps McSirTuna from Buffalo Pinball!!) which mentioned this part of the ruleset and it opened this machine up so much. MET seems to get this bad rap of 'chopping wood', but when you throw the item collection rules into the mix (and as a player understand them) it completely blows that argument out of the water!
Not sure if its been covered before, but you can also light a full row off the plunge as well, kind of like a super skill shot I guess. Its very, very hard to do as it always defaults to the left most item row that isn't locked in. So you have to long plunge around, get control and get the ball back up possibly the left orbit within a very limited time. It will then flash all item lights on that row. You then need to lock it in by shooting the same shot again, which then lights the captive ball hurry up (pro model) which needs to be hit. This is possibly easier to understand on the Premium and LE as the colour changing inserts can guide you a bit better possibly?
If I miss it off the plunge I try to lock the item rows in from left to right so its an easier skill shot next time e.g if the item rows have been locked in for left orbit, grave and left ramp, all items on the right ramp will be lit on next plunge, which is a lot easier to hit in a short period of time.