It is hard. I did LLB Law.
I wouldn't do it unless you are passionate about law, or if you want to be a solicitor/barrister/legal executive. I say that, because it has the lowest 1st class degree rate of all degrees. Therefore, unless you need a qualifying law degree, you should do whatever most interests you.
Half of the degree is remembering and applying case law, the other half is more normative (such as whether or not laws on theft are fit for purpose, or whether or not there should be a duty to act on good faith in contract law).