My Impression
The first thing has hits you at EnglishMansion is the size. This is a truly huge site, with tons of exclusive content. The owner of the site is Sidonia von Bork, a reowned Domme and she has certainly collected a lot of videos and photos. The main focus here is Females dominating males, and this is done through humiliation, bondage and torture.

A lot of famous Dommes feature on the site, and these ladies are true lifestyle Dommes. There's no faking it here, the pain is real, the bondage is tight and these women are cruel bitches.

INSIDE
I was impressed at the variety on offer here. The scenes are rich and varied, lavish sets and lots of new faces. Inside the members area is a diary section, where Mistress's discuss their thoughts. The community feeling is strong, with user submitted stories and interviews with Dommes.

Surprisingly there is a good search engine, something that seems to be lacking in most BDSM sites. Updates are regular, but not daily (a trend the industry is heading toward). The photosets are good quality, covering a wide spectrum of activities: heavy bondage, spanking, foot worship, caging, CBT etc

The videos are divided up into five main categories: Dungeon, Barracks, Boudoir, Clinic and Office. These videos are good length and reasonable quality. They are not typically story driven, mainly preferring to go straight for the action. The costuming and Mistress's true ability make up for the low production costs. A nice touch is the audio files (a sadly underrated format) which are exciting and demanding.

Overall
The content alone makes this a good choice, because there's something for everyone. In many respects this site sets the benchmark in terms of value and community involvement.