I gave it a try, I loved the original series and it's also fresh in my mind because it was on Drama channel (or something) every night at about 6ish only last year, watched the whole thing. To be fair I was quite impressed, really liked the Siegfried character although it's difficult not to compare, Helen for example in the TV series was a bit more 'posh' but I think they've kept to the era really well (before it started I said to my OH I wonder if it will have lots of sex and swearing in to make it more popular!!).
Will definitely continue watching - I didn't notice the incidental music but the theme tune at the end with the credits was exactly the same as the original.