These vocabulary cards are phenomenal. They are keyed to Mounce's BBG, which I would say is a must have for Greek Grammar, I would not use another Grammar. The cards are an exceptional value, having roughly 1000 cards for all of the words occurring 10x or more in the GNT. There is no reason to make your own cards when you can buy them done for such a good price, and in great quality. They are very portable and have large easy to read font. These have rapidly sped up my vocab learning. You will not regret getting these vocabulary flash cards!
I've really enjoyed using these flash cards. I can take a hundred or so and put them in my pocket and pull them out for some quick revision wherever I have an idle moment; waiting to collect my daughter from school, standing in line at the bank etc. The principal parts at the bottom of the verb cards are great. A great tool for learning NT Greek.