I hated it the first time i went because it is very pedally, i think it requires a higher fitness level to enjoy.
The second time i went i enjoyed it much more being fitter. Some bits i still hate, namely the rocky slow uphill bits, but there are plenty of bits i like especially the new bits.
I say ignore every single comment you have read and go and find out for yourself.
I wouldn’t plan on more than half a day though.
I can spend longer at Lee Quarry its great for sessioning.