lovinto .... I don't know what ties you may have with Greenpark (if any) or negative experiences with Minto, but you seem to dwell on this 'water purification system' as the single most important feature in condominium living ... I respectfully disagree with you opinion in this matter
More importantly .... in no way AT ALL is Greenpark even close to being comparable to Minto (known for it quality built products), whereas Greenpark builds poor quality subdivision houses (in my experience), so to judge Greenpark as one of the 'better builders' simply because of the water purification system that it offers and promotes would be pre-mature at best
I have full confidence in Minto and I'm sure many well versed in the market would feel the same way, given the location I think the project would do quite well since many empty nesters would like to downsize while staying in their Thornhill neighbourhood