Yes, I hold a valid visa, so hoping it won't be much of an issue.
No, no issue at all. You can legally stay for 3 months in any other EU country with the visa.
Just make sure that you comply with the basic requirements - make sure you've got money in your bank account, make sure that you have a reason (take the evidence of your business meeting / flight reservation) and carry your passport with the visa. Other than that, you're good to go!