What is the recovery like for bladder sling surgery?

Minimal. For a mesh sling only, there is minimal pain and no real restrictions other than nothing in your vagina for 6 weeks. Driving and work can usually resume whenever you feel like it. This may vary from patient to patient but, having done thousands of mesh slings, it's rare to have pain or extended recovery.
Immediate. You go home same day of the procedure if no complications are encountered. The effect is immediate (you stop leaking urine when coughing and sneezing. And you can resume sexual activity in 2 weeks.