The G370 is an economical choice for someone who doesn't perform daily grooming. However, I have had it for less than a year, and the battery has already gone out. I get a mere 15 seconds of functionality until the machine stops completely, with the simultaneous use of the wall charger. Also, the plastic parts reflect the low price, and due to basic everyday wear and tear, the majority of the attachments (although the wide variety of the provided implements has been useful) nearly fall off of the trimmer's body mid-shave.
The design has been a bit of a problem, to be perfectly honest. It's been my observation that this specific trimmer was designed by someone who has never had to focus on trimming a beard before; it's difficult to be sure not to hit the button to release the attachment while you're focused on precision shaving, and since every man cares deeply about the look of his beard/mustache/sideburns, they're bound to hit the button to mistakenly release it every once in a while. Also, there is a lot of give in the locking mechanism keeping the attachment in place, resulting in a difficulty in precision trimming.
More or less, the product is not very precise, and the price reflects the quality of its construction.