excellent
have been really pleased with the Modkat - despite the cost. box means that you can have a greater depth of litter which allows for more digging and helps make sure everything is absorbed. there's been little or no tracking from the box and both kittens adjusted to using it very quickly. looks good, easy to keep clean, cats like it and so do I.
Only downsides are it is quite a big capacity so needs a lot of litter to get started to give a reasonable depth. And at the moment despite earlier comments replacement parts (liner, scoop etc) are hard to come by in UK. so a torn liner at the moment would be a real problem. Zooplus don't list liners on the UK website, and following correspondence says they will be on the EU website but the replacement liners aren't in stock at the moment.
Otherwise good but expensive