Well, in FT-Best European Schools is ranked #10; above ESADE, Essec, SSE, City University or LSE, which all seem to have better reputation than Vlerick. However, you should think of the program you want to study, because the thing can be completely different.
In the MBA rankings ESADE is 9, and Vlerick 27. Conversely, in the MiM salary report, Vlerick alumni gain $1200 more per year than ESADE alumni (although LSE, Essec, SSE and City alumni are way wealthier than Vlerick). I recommend you to play with the FT variables and charts in order to compare the data that is meaningful for you.
IMO Vlerick is a good business school, but all depends on your aims. If you want to work in the US I'm afraid a Belgium/Greece MBA won't be good recognised. If you want to work in the UK, I'd definitely go the UK. In short, I'd only go to Vlerick if I were planning to work within the area, or I couldn't aspire to a better program.
Hope this helps.
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