Don't make hasty decisions except in two cases:
1. You get a rebate on the EVSE and installation such that it's virtually free.
2. You are in a challenging/highly variable usage environment that will stress the range of the Bolt on a regular basis.
Realize that with the L1 charger that comes with the car, and 10 hours of recharging available per night, that a Bolt can recharge up to 400 miles of range a week with typical efficiencies.
I'm just advising not to pull the trigger out of hand. Try out the EVSE that comes with the Bolt for a few weeks for regular usage and hopefully a week or two of unusual usage. You may be surprised to find that it satisfies all your charging needs.
Even if that's not the case, it's possible to install a 240V outlet (I recommend a 50 amp circuit with a 14-50 receptacle) and use the OEM EVSE at 240V, gaining twice the speed.
Look at it this way: If an extra charging station was an absolute requirement to use the vehicle, then the manufacturer would have supplied it. While I'm well aware of many folks here who have unusual situations that absolutely requires a higher powered station, it's a stretch to assume that everyone is in the exact same situation. That's why I always suggest starting at 120V and gather some real usage data. If it turns out to be inadequate, then you still have options and are making an informed decision.
We had a user here that came along a while ago with this exact same question. After some querying came across the information that normal usage is 11 miles per day. But that user for some reason wanted to recharge from low State of Charge (SOC) overnight only after depleting the battery after 20 or more days of usage. They invested in a brand new 50A 240V line and a top of the line JuiceBox at 40A when they could have just as easily plugged the OEM EVSE into the wall once every 3 or 4 days and covered virtually all their charging needs.
Every time I post this, I get feedback at 120V isn't enough. That's not what I'm suggesting. I'm suggesting taking some time to gather actual data then use it to make an informed decision.
ga2500ev