A consideration for me would be that this device is likely to remain powered-on 24/7, so energy efficiency ranks highly, simply because it results in higher electricity bills.
You can get a very very rough, guesstimate of actual annual cost by converting the steady state wattage into pounds per year, ie a device that consumes 10 watts, think of it as costing £10 per year. It’s not accurate, nowhere near in fact and it might turn out to be more like £15, but gives an idea.
After a few years, for a device running 24/7, that cost often starts to outweigh the up-front purchase costs.
Netgear have always been a bit shy of publishing actual consumption, imho. Best I can find is
https://www.downloads.netgear.com/files/GDC/WN3000RPV2/WN3000RPv2_UM_2April2014.pdfPower consumption
100-240V ~0.1 A, 50-60 Hz
You can’t deduce real AC power consumption (hence cost) from just multiplying Volts and Amps without knowing the power factor, which they are not telling us. All the same, it looks as if Netgear are encouraging people to think that consumption is around 10-25W. That does seem high to the point of disbelief, but it’s all I can find. If true, it’d be costing maybe £10-£25 or a bit more per year, to run.
In contrast, as one example, I’ve sometimes found TP-link to be more open about power consumption of the stuff they make. Not sure if this device delivers the same functionality, but...
https://www.tp-link.com/uk/home-networking/range-extender/tl-wa855re/#specificationsPower Consumption About 3W
Much more helpful, and allows us to think in terms of £3 per year, or a bit more, to run it.