Without going into too much detail - clearly it depends. If you want to do a history degree then certainly. If you want to go down a specific profession route such as medicine then less so (most med schools are fairly picky about having specific subjects which limits other options since most schools are moving towards 3). However it is a good 'currency subject' and is one of the few humanities on the Russell Group facilitating subject list, which in theory means it is more highly regarded. However in practice this can be overstated - for example the 3 historians we sent to Oxford last year all had a politics A2 which is not on the facilitating subject list.

Academically history is in a period of flux - we have just moved to the more content heavy Linear A-level which by my reckoning (though it only started in sept) will reward those students who have the gut analysis of why events are caused and what motivates individual and classes, those who get by on plodding revision will do worse than there pre-2015 cousins.

In terms of content it entirely depends on the school option. With so many exam board and options it is impossible to say what individual courses are like. Our edexcel nationalism option is pretty interesting and broad but lacks any meaningful social history.

Aside from that I would say it comes down to how much you enjoy the subject, find it easy to 'get it' and write well (which at this level is intimately linked to reading levels and type). It is a GREAT course if you are history nerd and will reward in grades but hard work to plough through if you are doing it as an 'also ran' option and grades suffer as you are just trying to remember pages and pages of arbitrary facts you are not interested in.

Hope this helps!