I’ve had the slim 45W RavPower one since June and it’s great. It’s almost startling how small it is. I much prefer it in the bag for coffee shop trips, etc. I use it with my 15” MBP and I haven’t seen any power issues with plenty of Chrome tabs and InDesign/Photoshop running. I usually have the extension cord on the 87W one at home—it’s so nice not to have to lug that whole assembly or look for the smaller attachment.
I mean, when it works it will work. When it fails ... you'll be depending on the protection circuitry in your laptop. If it goes catastrophic/worst-case, your laptop might be exposed to mains power.
One time it happened in Australia, who investigated the cause thoroughly:
> We know absolutely that the charger itself failed, and that it arced between the 240 volt input and the five volt output. So that's definitive," said Lynelle Collins of NSW Fair Trading. "We've got photos, we've got proof that's been dismantled, so we know that the charger failed.
