Your instructions (http://wizardistanbul.com/transportation-in-istanbul/how-to-get-from-istanbul-to-bursa/) say that after taking a ferry from Yenikapi to Mudanya (the ferry actually goes to Güzelyalı) there is a bus that goes straight to the city center of Bursa in 15-20 minutes.

However, from here http://www.turkeytravelplanner.com/trans/Ship/ist_bursa_fy.html it is said that:
“After debarking at Güzelyalı, look for the line of people buying bus tickets (TL2). The yellow city bus, or a smaller minibus, takes you in 20 or 30 minutes to the Organize Sanayi (OHR-gah-nee-ZEH sah-nah-yee) terminus of the Bursaray (Bursa’s Metro; TL2), from which it’s another 15-minute ride to the city center.”

That would mean another 45 min after the ferry trip. Would you agree with this? Can you provide any detailed instructions on how to get to the city center (and out)?

I am going to Bursa with my friend for a day and we need to get back to Istanbul in time so the schedule is pretty tight. That’s why we want to avoid any unpleasant surprises when traveling.