Another happy Sidekick user, here. I'm not so sure I'd like to have a OHT...possibly too easily opened, and could accidentally open causing injury if you are not 100% familiar with it's characteristics...just me. If I'm doing something that will involves the need for a tool, I get the tool ready to use, then continue. Sure, I can see where there could be times when you need your MT open and at the ready NOW...something goes badly wrong and you have seconds to react before a bad and unexpected thing turns very ugly.
I have had a few low-cost MT (translated: cheaply made, waste of money) over the years and I eventually find an easy way to cause a failure (even a broken can opener can be cause for a set-back). I decided that instead of spending money to replace broken tools every few years to, instead, just get a good one and be done with that chapter. I settled on the Leatherman Sidekick due to it's simple no-frills design, as I wanted something for dual-purpose, as in EDC and survival. Simple usually translates to durability and reliability, providing it was constructed with quality in mind. With the leather pouch and carabiner, it allows for multiple carry options. The Sidekick's multiple blades will prove to be very useful for survival, as well as the saw and file. I do use it on occasion for quick and simple adjustments on things when I don't have easy access to the proper tools, but when I'm actually going to work on something in depth, that's when the toolbox comes out. I did learn that you can strip the head on phillips headlamp adjustment screws with the sidekick's phillips driver, if they are stubborn...that was one of those times when the tool box should have come out. Even good quality multitools have their limitations.
I do like being able to buy replacement parts, if needed, and their warranty, but, above all else the made in USA quality. It's hard to find US-made tools/goods, but I buy it where/when it fits my needs. I don't own and haven't used any Gerber or SOG MTs, so can't vouch for them, but Leatherman has a solid reputation...I definitely recommend the Sidekick for BOB/GHB.