My experience with the typical household dripper hoses - like the ones pictured, made of soft ABS, and connected with nipple connectors secured with plastic rings - is that they fail frequently; under pressure, the hose comes off the nipple, leaving a jet of water squirting into the garden. (I have had more luck gradually replacing the failed plastic clips with automotive hose clamps, but they aren't cheap.)
I am thinking of hiding a distributor hose inside a balcony floor (and from there to planter boxes).
There is limited limited access under the balcony floor. If I do so, repairing a failure will be a half-day job of removing decking boards. I want to avoid that. Also, a long-term slow dripping leak will damage the soffit.
So, for the key sections, I am looking at 15mm polyethylene "rural irrigation pipe" - it is rigid and the ends are threaded. It looks like it would be much more robust and unlikely to leak or disconnect at the connections.
Is that a fair assessment? Am I likely to get a low-maintenance solution if I set-up a network of irrigation pipe with threaded elbow and tee bends? Am I just going to be spending my weekends pulling apart decking to add more plumber's tape?