I ended up renting a space from Price Wine Storage on Saranap in Walnut Creek. I never even made it up to the Wine Chest. I figured it's closer to my house, in a pretty good neighborhood, underground, clean, and has a friendly staff.

It's very clean and quiet. I've been there twice and only saw one other car that was moving near the place. It's right across the street from a mortuary. (Quiet crowd). The wine facility is accessible via a keypad that opens the door of an elevator. The elevator takes you down one floor below the parking lot. It opens to two large oak doors that enter into the temp/humidity controlled area. They have two "Home Depot" style flat carts for hauling stuff between your car and your locker. They have one of those warehouse style stair-ladders for people like me with top row lockers. It's on wheels and forms a sturdy tripod so it won't tip.

I rented the smallest "18 case" space. It's a big old cube measuring 30.5" wide by 36.5" tall by 41" deep. My initial calculations tell me I can fit about 18 of the regular (non-foam) wine case boxes with about 5.5" to 6" on the side and top for stuffing odd size bottles or 3 bottle inline boxes if I need to.

I was given my own lock, brand new and out of a sealed retail case. I have all three keys. The space costs $25 per month. The first two months are 1/2 price for a promotional deal. There is a $20 one time admin. fee presumably for the lock and paperwork. He told me about all fees and costs up front before I even said I would take the space so there were no surprises.

He said that they accept deliveries but I didn't ask any details on the subject. You can pay your monthly at their website or you can, if you want, have it auto deducted every month.

He said in the 1.5 years he's been there they've never had a theft or a cooling system  breakdown. I believe even if something did break down, it would take a long time for it to get hot if ever. It's underground and insulated. There are security cameras in several places to watch who comes in and out FWIW.