What's open so far is basically a shopping centre. But there's a large chunk (the middle section, and the upper levels) that are still closed off. So we're not really seeing the finished thing yet.
Don't think there's much point me going on about whether it should have been something else, or whether there should be more affordable housing, or whatever. Those arguments have all already been had.
First time to approach it from the south. There's a kind of canyon-like pedestrian street that runs towards the big central entrance on the south side. This street is also not complete - I guess it will run to Battersea Park Rd eventually? It goes between the various new housing blocks including the Frank Gehry ones. There's been quite a lot of criticism (probably including from me in the past) about how much stuff - high rise housing blocks mainly - has been packed around the building, such that it is quite hemmed in on three sides (two sides at the moment - blocks to the eastern side are yet to be built up). Actually in reality I think I'm ok with this though. In fact I quite enjoyed the approach along the canyon - you get glimpses of the power station as you go along; it somehow emphasises its size, and it's only when you're quite close you see the whole thing and it has some impact. A lot of people are snooty about the Gehry blocks but I don't mind these either; I think they set off the severe brickwork of the power station quite well. I don't know what they are like inside of course, or how they will weather. Most of the other blocks are fairly boring (but I'm also kind of OK with the ones that are pretty much just a glass wall to the west, inbetween the PS and the railway tracks).
Inside ... once you've accepted it's a shopping centre - I didn't have really strong feelings either way. I didn't hate it, I wasn't absolutely amazed by it. It's perhaps kind of what I'd have expected. Bits of the restored original building are visible; they in themselves are very nice. Could argue about whether there's too much intervention from new elements. There has to be some new stuff if you're not going to just have an empty shell. The west turbine hall is the nicer one. It's the one in the photos above. Unlike in Tate Modern, it's not been left essentially empty - those walkways have been put in along all sides - so you lose some of the sense of the vertical space. it's a shame the big pillaster columns get interrupted by walkways for example. But... having decided that's what's going to happen, it's not been done in a terrible way.
It reminded me a bit of a building I saw in Paris earlier in the year
The iconic La Samaritaine department store has reopened in Paris, France, following an extensive renovation led by Pritzker Prize-winning studio SANAA that includes a new undulating glass facade.
www.dezeen.com
(the restored older bits of it)
That restoration has been done very well - slightly earlier building, and it was always a department store, so not directly comparable. But similar in a few ways nonetheless. I actually was quite moved when I saw that Paris one. This doesn't happen all that often, although I look at a lot of buildings. Maybe it was just that I was sleep deprived. But anyway it is very beautiful inside. I didn't get the same feeling inside Battersea Power Station today ... even though it's a great building and long one of my favourites in London. So, whatever they have done, they haven't quite pulled it off such that it provoked me to a sense of awe or wonder (which maybe I was hoping it might). But - I'm going to reserve judgement until the rest of it is opened.
It's not a second-rate shopping centre. If I was going to go to a shopping centre, there's no doubt I'd choose BPS over Westfield (and it seems aimed at a Westfield-ish market to me).