Hello- are upgrade policies as straight forward as they sound where you get dollar for dollar towards another purchase with these 2 vendors. Can you share your upgrade experiences good or bad? I am interested in a either a Whiteflash ACA or GOG August Vintage Round- the August Vintage Rounds in the color, size, clarity that I want are seemingly scarce but I need a ring asap so I was debating over purchasing one they currently have in a lower clarity and color and then upgrading to what I want when it becomes available? It''s sounds like it might be a bit of an inconvenience, but if it was a relatively painless process, I would be more than willing to embark on the journey get the diamond that I want.... I am also considering Whiteflash- they have something suitable that seems to be slightly pricier than other vendors but would buy from them for the peace of mind of upgrading in the future and their good reputation. What is your experience- I have narrowed down to these vendors but feel free to share any upgrade experiences with me- I thank you so much.