Tacktick micro compass

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I am interested in purchasing a micro tacktick. I currently use a round globe compass with lubber lines and have found it to be invaluable in many cases. I have been writing compass heading on the combing of the boat and have been doing simple math in my head as I sail. I also struggle with making accurate readings as the boat bounces along, and the lines are pretty close together. This is distracting, and prevents me from having my head out of the boat as much as it should be.

Never having used a tacktick, could someone explain what it will do for me? Is it really worth the expensed? Do some consider it cheating, and if so why? Do you think it will become illegal in the FS class?

Thanks in advance for any input
John
FS3873