For quite some time I've been using coated running lines for the bulk of my fishing- usually Norris or Airflo 30lb, with 20lb for switch rods. I've also used Amnesia Mono for quite some years now for all my Tay gear, 30lb and 40lb. Both types have their merits and pitfalls. Given a choice I usually plumb for coated 30lb floating running line, in my eye's distance isn't everything, presentation does count for a lot more. Coated stuff dosen't kink and tangle line mono's do and a very important benefit in that it comes ready looped up, I've never used a mono yet that didn't at least irritate me with knots at the front loops and it has to be said where it joins to the backing too.. Yes mono can be utilised in longer lengths 50m or 100m easily which means one is less likely to be playing fish with knots and splices running through the rod rings constantly. I did use and it has to be said recommend Maxcatch coated running lines for quite a while, that was until the front loops started just pulling neatly off when subjected to pressure, so I'm sorry to say I don't go near them now or would I recommend them at all, no matter the cost or the shoot ability of them.
There is a 3rd choice available now in the Polythene running lines. For over a year now I've used Rio Powerflex in 25lb on my Switch rods. It floats, has pre- formed loops, dosent tangle like mono can do and it certainly dosent kink like mono can do. It's thinner than coated running lines but not quite as thin as a similar mono- a very good compromise!. I've also just spooled up with a spool of Monic running line, thin, 100% float ability, shoots like f**k and has pre- formed loops and 70lb b.s. so no more knots. I'm very impressed with this stuff, sadly only 30m, but for my 12ft 6 7 weight it's proving to be quite the revelation!. Typical in that Monic appear to have just gone under or ceased trading now I've cottoned on!.
The Maxcatch coated stuff would certainly be what M.A.Johnson could be looking for, but seriously I wouldn't recommend it at all after two lots letting go on me!. I have a spool of the Rio stuff to try, 44lb mono with a coated handling section, but as yet it's untried by me so I can't comment. I've also a spool of Guideline with a tapered handling section to a coated running line, but I gather they're hard to find as Guideline seem to be struggling getting fly lines out onto shelves.
It's not an easy choice to make, I mean hand on heart how many times does out n out distance matter, over a seasons fishing I feel coated running lines are easier to handle and use, they actually float and you'll get far less in the way of serious fankles with them compared to mono.
Thing is with a mono running line, all the floatability, pre formed loops and handling sections in the world won't matter a sparrows fart once it starts to kink, because then its just a fast lane to ever more problems the more you use it. I'd also throw one more thing into the ring, floating mono's generally don't float and of those that do ( Varivas ) and have hollow air chambers in them once they kink or get tangled they're goosed and will attract tangles for ever more and just get worse and worse.
I'd say there's the probability of greater longevity and less trouble with coated running lines over time and I've always found they very easy to use and handle.
One more little snippet, any mono or thinner running line will perform better and for longer when utilised from wide Large Arbour reels. The wider the reel drum they're stored on and fished from, the less likely they are to become coil bound which leads to tangles and fankles, get the reel properly full too it will make a significant difference.
Pedro.