I used this el cheapo basic litter ever since I got my cat several years ago and it worked perfectly well – clumping, was £5.99 for 15l IIRC then went up a few quid but was still the cheapest in the shop.
It's now been discontinued and I'm tearing my hair out for alternatives – even considerably more expensive stuff is leaving trails all the way out of the litter tray, which the Essentials stuff never did, and it's all super-sticky to remove from the bottom of the tray when I'm cleaning it, too.
Anyone also used the Essentials and has found an acceptable alternative? Fed up hoovering the dusty trails every flipping day!