Are you using the OEM dual voltage EVSE that came with your newer Leaf? What charge currents do you want/need?
I've had good luck with several cheaper aftermarket Chinese EVSEs, some adjustable amperage and some fixed amperage but all dual voltage(120/240v including 208) so it kind of depends on what you want.
The cheapest ones will be fixed amperage(or a max of 16a on both 120 and 240) so for those if using on 120 you definitely need a 20a circuit and a good quality one at that. It's one reason I don't suggest them for someone who wants to charge on 120v, 240v is generally at least a 20a circuit and again generally dedicated. Oh and what kind of plugs do you have? There are lots of different types of 240v plugs, 14-50 or what the OEM dual voltage Leaf EVSE comes with but oftentimes aftermarket 16a ones will come with a 6-20 plug which looks like a standard 120v plug but one of the prongs are sideways. You can purchase or make plug adapters that aren't to expensive but if you'll always be using one plug then it would be nice to order it with your plug type and then a plug adapter to go to a 120v plug which some might actually come with.
You don't have to spend an arm and a leg for an EVSE but there are some real cheap ones out there that you'll want to avoid. The OEM is a great EVSE, built like a tank so you can't go wrong with it but new they are outrageously expensive, used can be a decent option.