It's a shame that mats are so darned expensive - it really prohibits trying other brands out. Many years ago (decades!), my first mat was a Fiskars, as that was what was available near me then. Then I went to Olfa brand, which was a huge improvement over the Fiskars for me. Others like the Fiskars better.
Now I only use Martelli; I don't find that I have to press harder (it's my shoulders that cause pain more than wrists), even though the surface on them is almost cushioned. I've never had any slippage using them, with or without my Slidelock (which I love when cutting several layers at once). I have ironed on them, without problem, and occasionally use the lines for measuring large pieces. I have one of their strip rulers and the ergonomic cutter, but do not care for either of them.
If you find you are pressing hard - causing both slipping and wrist pain - check to see if you need a new blade in your cutter. Like many quilters, I don't change mine as often as I should, but am most always surprised how easy cutting is when I do! Amazon carries the multi packs for less than the big box store, even when the store has 50% off coupons.