Burke & Hare (1971) will really only appeal to those who appreciate low-budget British horror films of the 70's. If you want to learn about the crimes committed by these two men then there are better films available than this one. This film does stick closely to the actual events, though parts of the story have been omitted.
1820's Edinburgh is presented as a city whose inhabitants are either wealthy or impoverished. Rich men wear expensive clothes and visit high-class brothels, while the poor are reduced to begging for pennies and shovelling up horse manure. Burke and Hare aren't portrayed as evil monsters, but as hard-up immoral men driven by their greed for money and want of a better life.
For a low-budget film Burke and Hare actually stands up well compared with other similar films of the time. The costumes and sets are very good (though nowhere close to what Hammer were capable of in the early 70's). The actors all turn in fine performances with no one letting the side down. Highlights include a scene where elderly doctors exchange amusing stories about their patients over dinner. There's some enjoyable scenes set in a brothel featuring a bevy of incredibly attractive young ladies. And there's some particularly impressive black humour such as "Show a little respect for the dead man, and get yer arse off the coffin!".
What really lets this film down is the music. The film opens with a totally inappropriate upbeat, Chas & Dave-style, Cockney knees up theme tune (complete with lyrics such as: Burke and Hare, Beware of them, Burke and Hare, The pair of `em, Out to snatch, Your body from you!). The film is also peppered with Carry On-style incidental music that completely ruins the atmosphere. When the filmmakers do get the music right the film works well - such as in the graveyard scene at the beginning). I think the director should have been aiming more for a tone similar to 10 Rillington Place (also 1971). After all, we are dealing with real-life murders here.
As far as the DVD goes, it's as bog-standard as you can get - no extras, no subtitles, just the film and nothing else. The picture quality is not up to the standards we've come to expect from DVD, but is still perfectly watchable.
If you enjoy this film, then may I recommend you check out Hammer's Dr. Jekyll & Sister Hyde (1971) if you haven't already seen it.