Egham is the third ACS campus. The reviews on this site were all pretty accurate about the ACS group of schools, and TASIS, last time I checked. Salary would be your main consideration as none of the previously mentioned schools, outside of Southbank, pay anywhere near what ASL pays, and they are, indeed, for profit. Yes, Cobham campus is wonderful, but can you afford to live in the most expensive part of the UK on the salary they pay, unless you're a teaching couple and, even then, it's a stretch. Try asking the same question on the TES overseas teaching forum, where you can receive PMs and, perhaps, more specific information.