A boost like The Drive is a really useful tool. Whether you need your amp to come alive, to increase the overall volume for a solo or just a subtle nice overdrive, The Drive makes all the difference. It will add richness and nice harmonics to your guitar sound. Used with a bass, it can also give you that nice slightly saturated sound of a vintage tube amp - even when you play a solid state amp.
The Drive is the kind of device you might leave on without thinking about it, but miss dearly when you turn it off.