i got a XXXXL corepad deskpad (1200 x 600 x 3.0 mm / 47.20 x 23.60 x 0.1 in)
i've used it for.. well, damn, i don't even know anymore. 3+ years by now?
thing is still in excellent shape.
of course it attracts dust and skin-cells like every other cloth mat, so it's up to you how often you clean it(wipe it down).
but all you really need is a little bit of warm water + something like microfiber to clean it. very little water is needed.
i wipe mine down about 2 times a month (only mouse- and keyboard areas). and once a year, i clean the whole thing.
i have a func f-series 10 (plastic pad) and its durability is great.
what i personally don't like about it is that it is so smooth, that i actually have to 'hold back' when i move my mouse around. meaning that the pad itself provides so little friction that you have to 'stop your mouse yourself', if that makes sense.
but what's obvious is that it lasts an incredibly long time without wearing down at all. and that's definitely one of its pros.
used it for 2+ years, there's no sign of wear.
i have an aluminium pad (alugraphics gamerpro xxl) as well. the thing is great, except for that some optical sensors do not track well on it. (the "maximum tracking speed" goes down a bit, for some optical mice.)
a downside might be, that the thing can get very cold (in winter). personally i am not bothered by it, though.
another thing to note is that it makes a lot of sound (a bit like a frosted glass pad) when moving a mouse over it. some people are annoyed by this sound/feel. there's a lot of friction with this pad, which is what causes this.
used for 3+ years, no sign of wear.
so, in terms of longevity, i can definitely recommend the func f-series 10 and the alugraphics gamerpro xxl.
they are also incredibly easy to clean (warm water + any simple piece of cloth cloth = easy 100% clean).
corepad deskpad means having a nice soft material for your arms, wrists and hands. nice bonus.
good tracking for any mouse.
very durable for a cloth mat. (but like any other cloth mat, it will wear out over time.)
to be clear: do not expect a cloth mat that stays clean. because they don't.
also, i play games frequently. if you do not, then some of the mentioned 'potential downsides' might not matter to you at all.