I have and have had a number, but to answer your question, it is important to know what implant you are referring to and how you plan to use it.
Eg, My custom payment was in P4 Right, this was great for pay terminals
My FlexM1 is in P1 Right I use a lot for hotel doors etc. and works well
My ApexFlex is P1 Left, I find this convenient to read with my Phone, as I am right handed, so naturally easy to tap with my phone.
Whatever you have, or plan to get, I would recommend you accompany it with a MFGC