We used this space for 5 people during our recent trip to Chicago for Star Wars Celebration. While it's about 20-25 minutes away from the convention center, it was spacious, convenient, and definitely helped accommodate all our crazy costumes, with room to spare.
The street parking was great, and free. Our car was fine the entire time it was parked. While we didn't drive into the city, Ubers and Lyfts were there within 2-4 minutes, and were moderately priced.
Lara was great at checking in with us to make sure we were comfortable, if we had everything we needed, and to see if we had any questions; she responded really quickly when I reached out to her about snow procedures (in mid April, no less).