My advice: make sure you understand Redfin’s touring policy. First 3 hours free, and the remaining ones charged at $250/tour. Don’t complain: it makes total sense in a “get what you pay for” business model that saves you money in the end.
If Redfin suggests that you call the seller’s broker for showing, you better think twice. You may get pretty nasty behavior from them. (“Why should I do Redfin’s work on my nickel” they will protest…)