I love Lush! But I'm quite choosy about what I buy from there since it's so expensive...
I really rate the shampoo bars! Have been using them on and off since 2011 and recently discovered the honey-scented one - which is amazing for my hair as it's long and usually tangles really easily. Now that I've started using this product I can even get away with not using any conditioner / detangling spray if there's none available. (I'm not too mad about the solid conditioner though, bought the Daddy O one at the same time and it doesn't seem to do much)
Also a big fan of the dry shampoo, although I'm hesitant to buy it again because I do think you could probably make it at home just with cornflour and a couple of other bits... so I'd like to try that first before buying it again. It's also trickier to use than the spray ones, but does a good job once you get the hang of it and lasts WAY longer.
I don't really buy the soaps, bath bombs, skin care from there anymore... just not convinced they're worth it price-wise. I did love Ultrabland while I was using it though! As well as Ocean Salt, Rub Rub Rub, the black body scrub (sorry, can't remember the name).
Aside from the solid and dry shampoo, I do also quite like the toothy tabs (although they discontinued the clove one I used to use back when they came in matchbox-style packaging!) and the powder deodorant. My boyfriend loves the solid shampoo and also Daddy O shampoo. Also recently discovered the massage bar with the azuki beans in, which is very good!
To sum up... I think they have great stuff, but I wouldn't be replacing all my toiletries with things from there, really only the things that I would benefit from or the occasional treat. Zero waste is a great cause but there are other (cheaper) places that also make zero-waste products.
By the way! I've generally found if you ask for a sample of a product so you can see what you think before you buy, they're normally more than willing to do that!
(well, doesn't work for shampoo bars etc., but ok for anything liquidy or toothy tabs)
Sorry for the essay but I hope that helps! 