I have quite a few from many different brands.
I would avaoid new balance as mine left red marks all over my bat. However, they are slightly longer than the rest so good if you have a long handle/blade.
I find the neoprene ones excellent I think neon do neoprene ones or alternatively mongoose.
There were some Bradbury ones on eBay for £7 posted which are good and appear to be from the same manufacturer as the h4L, affinity etc ones you get. (Not neoprene)
I always go for full length covers.
I got a cheap SF one from hockeycricket which I think is in Salisbury. Personally I’m not a fan of the windows you get in some covers as I find it unnecessary and just leaves an unprotected area.
I have a CP cover which has a zip rather than a Velcro fastening and that for me is also brilliant.