I've been on the spouse L visa for the last few years now. It's fairly straight forward to get, fill out the right form, take the relevant docs, i.e marriage certificate, spouse's i.d and hukou and your residence registration to the big PSB office, not forgetting photos x2. Take loads of copies of everything you have as you can never really be sure what they'll ask for. It normally takes 5 working days here in Shenzhen, not sure if other cities are different.
I've only ever been given 1 year multiple entry visas although they did say last time that next time they would give me 2 years, but i have heard that before.