i am not an expert, but i have read and participated in some debates re. this school on another forum. from what i can tell it is 2-4 years old, and operating on a charter from senegal, but having classes in england.
the students that i have heard from love it there, but they are rather defensive. i have heard no complaints about the education they are recieving. the two issues that i have heard discussed most recently is 1. that they tout themselves as an english school with affiliations with several english universitys, and 2. that they are operating outside the country of charter.
the first issue is based on the fact that they rent space from luton and claim that they are affiliated with some other english med schools. in reality it seems they are renting space, which is fine, but not an affiliation. seems a little nitpicky, but legit schools are truly legit and not misleading. for example, if st. georges has a visiting professor from harvard give a lecture, they do not claim harvard affiliation. not a big deal, really, but it is good to be wary of schools that try to mislead from the get-go.
the second issue is the main one, in my eyes. some states do look at your passport to see if you attended med school in the country of charter. if it is chartered in senegal and you were in england, that may raise some flags. the school has a limited number of grads out there (i think they are transfers) and they claim no problems so far. but, i think this should weigh heavily into your decision. if you do not want to be limited where you can practice, you may want to reconsider.
now, all my info is based on discussions on other boards with students who attend and others who think the school is terrible for its "false advertising". so, please take it with a grain of salt. my gut impression is that the school will be fine in most states over time, but prob not the biggies (such as CA.) and i do feel that these issues are pretty small...but it is a young school, so it is best to be careful. good luck!