I’m probably going against the grain here, but each to their own!
I am not a fan of delks, I had a set for a good while, and I brought 4 of them, 1 of which needed replacing under warranty very quickly as it packed up in the rain, so I ended up with 5, as the original was also returned (nice touch)
of those 5, the replacement plus two others packed up in the rain, I fixed it in the end myself by spraying them all with WD40 and wiping off the excess then leaving them to dry, which did stop the problem for a while, also I’m a simple soul, all the sensitivity, tone, volume etc was just too much adjustment for me, I could never get the tone “just right” very silly complaint I know, but that’s just me. The delks went to my son, who loved them, and fair enough, they are good alarms, he’s moved onto fox mini microns, I still carry the delks as a back up set of alarms just in case…
but I’ve always been a huge Steve neville fan, so I would always go back to them…
mind you, of the 8 I’ve owned, one packed up after the battery would drain within 10mins of being switched on - it needs to get repaired, two of the “original” alarms cracked at the base - so it’s horses for courses really, the others are all going strong - yes battery replacement is a pain, and they have 3 settings, quiet, loud and off! But I love them and the sound of a screaming neville is awesome. their not without their issues, I’ve missed a run when the line dropped behind the roller, and I’ve had lightweight bobbins jam against the roller and stop it spinning which effectively silences the alarm - changing to mini swingers solved this issue.
the only fox alarms I’ve liked are the mini microns, I’m not a fan of the other fox alarms - I don’t like the shape, simple as that, I had micron m and mx alarms in the past and they did the job just fine.
I’m a fox fan though, my rods, reels, and most of my terminal tackle are all fox gear.
I’ve used nash siren alarms, and still do in my travelling kit, but they have a fiddly on off switch, I’m picky like that.
quite simply, we all have our favourites, gear we use and trust to do the job, if you like it and it works for you, that’s all that matters in the end