I've had the My Best Buy (Citibank) Credit Card for a few years now. The application process was simple. I was originally approved for $1200 CL, and my CK score at the time was around 680. I got an auto CLI to $2200 after a year or so, and just recently got another auto CLI to $3300. I've purchased quite a bit of stuff (TV's, laptop, smart watch, etc) and have never paid a cent of fees of interest because I use the 12, 18 or 24 month "special financing" (no interest if paid in full), and pay everything off..if I can't afford the monthly payments I don't buy it! I get things when they're on sale, and Apple products are cheaper at Best Buy than buying from from Apple.
I'm certain having this card has helped build my credit (CK score is now 780). If you like or need electronics (and can afford monthly payments), this is a great choice.