Af is finally gone!

So you know what that means!! Lol, so this cycle i want to try opks but im wondering which brand is best. Ive never used opks before. I need some that are affordable and easy to read and follow. Also, i work retail so im often at work during the afternoon so how/when would i test? I ask because i see a lot of women testing in the afternoon and multiple times a day. I see a lot of women using strips but ive also seen ppl using the digital....which is better/more effective? Does it depend on the person? What do you ladies prefer and how long did u use them before you bfp? Ps...ill also be using preseed so any success stories would be great too :)