Knife snobs look down on them, but in reality, they're good solid knives that will do what 99.9% of knife users ask of them.
The only potential downside, aside from the extra lock on them, is their looks could be the tipping point in some kind of LEO interaction, as opposed to a multi-tool, or case/buck folder with wooden or stag scales etc.
However, my EDC "big blade" is an old Emerson Super CQC7 from 96, back when he was still partnered with Benchmade, so I'm not one to really preach.