@andywilson123 you are opening a big can of big worms!
There are devotees to Fox, to Steve Neville, to Gardner Atts, Nash and of course Delkim.
What matters is your alarm buzzes for you on a take, whether you use mono or braid. Not all roller wheels work with braids!
Your alarm must buzz on line being taken or on dropbacks, your indicator should show you which, not really much need for a tone difference.
Now I've used Delkim ST alarms since 1993 or 94, and had the same set from 2000 until last year. (The first set was stolen).
In fact, they are still in use for pike fishing.
I replaced them with the new TXI'D which I also love.
I never had problems with water ingress, no funny bleeps, no faults, and believe me my gear really does get used on all weathers, from boiling hot to freezing cold, to mega thunderstorms and monsoons.
Reasons I don't like Fox alarms, I have had to return many to manufacturer faulty within warranty, on occasions before they even left the shop.
The new models released every couple of years; Micron, Mini Micron, replaced with Micron R, Micron S, then MR, MX, MXR, NTX and so on.
Get it right first time, not need an upgrade (or cynical) to convince anglers their old alarms aren't good enough, so have to buy new.
I actually liked the original budget Mini Microns, a perfect day only alarm (no extension box or receiver).
Now I'm certain that someone will probably tell me about Delkim false bleeps, there will be hearsay that 'Fred couldn't stop his bleeping, or rain got in', and some may well be true, but with many there is always an amount of user error. I mean we all read the instructions correctly for Delkims, our washing machine etc don't we, so not reading them leads to things not being right.
Actually I do have a slight Delkim gripe, I prefer an on/off switch rather than simultaneous double or triple button press, but it's a minor nuisance.