I only shave once every 4-6 days and have only used razors. (disposal and free trial from dollarshaveclub)
What's the difference between using electrical razors and is this more efficient and cost effective?
Is it a good investment and if so, what should you look out for when buying them?
Or is the disposable route better?
"electrical razors" , you mean electric shaver ?
it's a bit of hit & miss
won't shave as clean as razor
might take longer if you're after clean shave
else easy/fast for a quick shave every morning
no good for long beard / moustache
will need to replace the head after 2 yrs or so, some will stop working until you replace the head.
some let you continue using it until you're sick of the blunt head.
head might cost a bit for high end stuff
Try philips pt920, can be had for $80 on ebay 20% off when shavershop discount them on christmas/boxing to $99