Up until a few years ago, I was an advocate of the good old, simple, plain leather, non-padded, 3" wide strap. Relatively cheap and cheerful, does the job, was grippy enough not to slide about when you didn't want it to, etc. Did I mention relatively cheap? £10-15 per strap. Sorted. Never really used the "seatbelt" type straps for bass, but ideal for a well balanced electric guitar.
As age and it's related aches & pains advanced, I decided that I needed to invest in something with a bit of padding, and decided on getting a Mono GS1 Betty. I was so impressed, I bought one for each bass.