I gave up ages ago, essentially at the point where views seemed to be based on a one poster's experience of a DD studying fashion at a completely different college, and her other DD's experience of having nothing in common with a Chinese roommate somewhere completely different.
I sort of get what tripping is saying.
It depends on what you want from University.
Imperial/other top London colleges are truly fantastic if you want, either,
a) to get completely engaged in your subject. Lots of really interesting things going on, lots of very bright peers, and fantastic opportunities to develop interests (including a good programme of language and philosophy/humanities type supporting courses).
b) you want an internationally recognised degree, that will open lots of career doors.
It is probably not the place to go if you want a trad English University experience, and/or are not a self starter. There is a wider issue about marginal STEM students who struggle to make the step up to University level work, but I suspect it applies less at selective Universities, especially those who have not been through the fairly brutal tutoring regimes sometimes found in East Asia.
I first started posting on this board, because I felt it was sad that students might be discouraged from taking the opportunities London colleges have to offer because of the views of a few posters.
It really is horses for courses.
DS has been very happy at LSE. His idea of hell would be a traditional freshers week. Instead he is happy attending the astonishing array of public lectures and talks, voluntary seminars etc (at some point everyone worth listening to will pass through London) with his friends, be active in a couple of societies, do some sport, and head off to China Town with friends. He works very very hard, but he wants to. In retrospect he feels LSE was better for him than Cambridge (not that he had the choice) because he has been able to specialise a lot more. He is more than happy with the support he has had with the Economics UG tutor, from whom he has good individual advice on course choice and his Masters application. He suggests she is equally engaged, though less popular, with those who need to raise their game. The international aspect does not bother him. In part because students come from everywhere and "the Chinese" are a pretty diverse group, but also because his friendship group tends to be based on shared interests, mainly subject and society, rather than nationality.
In short he is having a world class educational experience, which is what he wanted from University. This appears equally true for his close friend, and also his cousin, who are both at Imperial.
Imperial is relatively well off. It is generally able to offer better accommodation for first years, and has better sports facilities. League tables have caused London Universities to look closely at their student satisfaction rates and do what they can to improve them. London is expensive, but students do find ways to live cheaply. It may seem overwhelming for a first year, but others can find themselves stir crazy in a third or fourth years at Warwick (waiting at the bus stop in Leamington Spa), Bath or St Andrews. I get those posters who did not enjoy their time in London. However, many years ago, London was the right place for me.
I hope people don't consider Imperial as an option based on previous posts. It really is the sort of place where the right student will meet "their people". But equally it is worth giving some thought to what you want from University, and factoring that as well as League Tables into any decision.
(And fwiw, both LSE and Imperial have their work-hard play-hard types. I understand that pre-loading for the annual LSE Athletics Union bash started at breakfast.)