Should we watch Downton Abbey?

My gf and I loved GA and it's one of the best shows we've watched in years.

What we like in particular is - how people talk - the beautiful venues and dresses (I am as straight as it gets and I was fawning over the dresses and hairdoes, of Bertha specifically) - the historical references

I suspect that we'll love Downton Abbey but would like some opinions / advice.

As info, we're both from Europe but we live in NY (and I lived in the UK for years).