As a current H1B and California resident, I am about to file my USC Spouse-based I-485 and concurrent I-130 by mail to the Chicago Direct Mail Lockbox facility. What are current experiences / comments / information on processing times and procedures with this new central filing system? Timelines? What can I expect from here on in? I'd appreciate any input from anyone in the same situation, or who is familiar with it - or even just point me to a thread that might already deal with this question. Thank you!