THEY MELT FAST!
Since Trader Joe's is not convenient to where I live, I had decided to purchase the sublingual B-12 at my local drug store.  What a mistake.  None of the products "melted instantly".  Waste of money.  So, I decided to buy them through Amazon.  They are the best B-12 under the tongue supplement on the market.  They melt instantly as stated and they certainly do.  I recommend them highly.
Rating: 5 stars