I'm a graduate from the 2011 MBA class in London and I'd advise caution when looking at Hult. You should be very clear about your goal. If you are simply looking for a credential (i.e. the ability to say you have an MBA) then Hult will provide that along with an amazing international experience and the opportunity to meet a wide range of interesting people from all around the world. If your goal is to gain mastery in a specific topic or have a challenging academic environment then Hult is not a good option.
The one year format means that the courses are condensed more like an "introduction to" than a master's level course. Also, Hult has aggressive growth goals so their recruiters are really salespeople bringing in as many candidates as possible instead of screening qualified candidates to find the perfect fit for the class.
Career services is another issue. In a traditional two year program students will spend the entire second year working with career services. In a one year program that time-frame is condensed to between 6 and 8 months for the most proactive students. Hult has changed their program to address this but I'm not sure how effective those changes have been and still hear complaints from current students. I personally had very little quality help from career services as a student and almost none as an Alumni. For the first several years after graduation my emails and phone calls to career services literally went unanswered and when I was able to set an appointment the counselor no-showed.
If you do choose Hult be aware that the tuition is negotiable. I has was pleased to have received a small "scholarship" of around $6K US. When I arrived on campus I found that I was on the lower end for scholarships and many of my classmates had received up to 50% or 60% of their tuition. This was especially true for those who signed up in the summer just before the academic year began. The scholarships were basically incentives because the sales team were behind on their quota.
The last point I'd make is about the student body. There are a lot of complaints on these blogs about the quality of students and how many of them should not have been accepted. I'll say that I was very impressed by around 10% of my class. These were very intelligent, hard working and driven students who would have been competitive candidates for a top tier school. Around 70% of the class are what I'd say were average performers (and I include myself in that category.) These were quality students who were intelligent, worked hard and were well suited to a high quality mid-tier university. Unfortunately around 20% of the class were the types of students complained about on these forums. They cheated, negotiated with professors to have their grades revised up after failing, paid other students to do their work and didn't contribute to group assignments. Since my graduation there has been ongoing messaging about how Hult is improving it's standards and I hope it's true.
Personally, I have very mixed feelings about my time at Hult. For me it was an incredible personal experience but had very little career or academic value, others in my class received more from the education but they had little to no business experience before attending. I often think I wasted an opportunity but at the same time have life experiences and friendships that I wouldn't give up. I hope that helps.