I have something similar and they come in handy. My 'regular' style pole telescopes instead of disassembling, but the end package is the very similar. Some people think a telescoping rod is less sensitive to feeling bites than a sectional, and there is some truth to that.
Nowadays, in my jeep I keep a Ronco 'Pocket Fisherman' for the various lakes and rivers in Texas during my wanderings. They look gimmicky, but for freshwater where the fish are typically smaller they actually work great.
I live around a lot of saltwater. For saltwater with the more common fish around here, for my compact portable gear I've had to carry some additional, beefier gear, like a high strength handline with steel leaders, larger hooks, etc. A throw net is also a must for things like shrimp and mullet.
Pocket Fisherman