Wahl USA Rechargeable Lithium Ion All in One Beard Trimmer for Men with Detail and Ear & Nose Hair Trimmer Attachment – Model 9854-600B

Great beard, mustache, nose, ear trimmer. Not hair.
I read a lot of the reviews and that helped me make my decision. I’ve had this trimmer a couple of months now, and really love it. I’ll start with the points I did NOT find easily in other reviews
Yes, it does a great job trimming the edges of your mustache above the lip, etc. I’ve had all-in-one beard groomers where the trimming attachment did not cut well. Not so with this one. The first time I used it I was instantly showing a lot more lip than I had planned on. In other words, it trims mustaches better than anything I have used before.
The other point I was unclear about in other reviews was the usefulness of the nose/ear trimmer attachment. I have owned 2 or 3 of those battery powered rotating types before, and always found them so-so. This trimmer attachment does a much better job than those, and is faster. Just stick it in your ear or nose and you’re done in 2 seconds, whereas the rotary types make you keep doing it for a while before it seems like you’re done. The noise level is not a problem at all for me – it’s noisy but not objectionable in your ear, about the same or less noise level as my rotary trimmer.
For beard trimming (I have a goatee that I keep fairly short), it works well but is slightly less convenient than the all-in-one beard groomers I have owned. You have to switch attachments, which is frankly very easy, though not as easy as just dialing in a 3 or 4 on one of those beard groomers. And the attachments are a bit of a pain because you have to either pick, for instance, a 2 or 3 beard trimmer, or else use the 6-position trimmer attachment. That 6-position trimmer attachment is what I use, and it’s fine, though adjusting it’s height requires a little more effort than it should.
Battery life is outstanding, and what puts it above everything else. It lasted 2 months of frequent use on its first charge, and I expect it to last for years. Other beard groomers I have owned (both Panasonic) died after a couple of years and had to be plugged in.
The attachments in general are a bit of a pain, as everyone else mentions. However, putting them on and off is really easy – not as complicated (at least to me) as others have mentioned. I keep them all in the tray on my countertop and it works fairly well. The tray gets really crowded, so I’ve take some of the attachments I’m never going to use and put them in a drawer. It is nice to have your oil and brush right there whenever you need them – otherwise I would not clean and oil it as often as I should:)
For haircutting, I agree with everyone else. This thing is really narrow, even with the wider cutting head attached. It’s about half the width of my corded Wahl trimmer, which is what I’ve been using to cut my hair (and does a great job). Also, the attachments are not long enough for my hair, which normally takes a 4 and a 5 attachment. Not sure if you can buy longer attachments for it or not. I think the best solution is just to spend another 30 bucks on the corded Wahl unit like I did. It’s a beast, seems to actually dim the lights when you turn it on (semi-kidding here but you get the idea).
For all around trimming, meaning sideburns and hairline at back of neck, it’s super. The normal attachment does a great job of shaping your hair and cuts super sharp.
In sum – it’s outstanding for moustache/ear/nose trimming as well as shaping your beard or hair at the edges. Don’t bother thinking it’s going to be very good for actually cutting your hair.

Comfortable in the hand, works well, great design.
I vote this the Best Rechargeable Battery Operated trimmer on the Market. At least one big catalog agrees with me.
My original one is still going strong after more years than I can remember (8? 10?). It is comfortable to hold, has no trouble with a thick beard, not too noisy, and a charged battery lasts for several days of use.
When I thought the battery was finally failing, I bought a second one, then I actually managed to fix the original (it wasn’t the battery – just some corrosion on the battery connections). Unlike most consumer goods these days, Wahl designed this to be taken apart, so replacing (fixing in my case) the battery is a real thing. The rubber grip peels back without tearing (roll it down like a condom), then the case opens with a screwdriver. Clean, swap the battery, lube, reassemble. Now I have two and they share accessories and chargers.
The fact that I researched a replacement and went back with the same model should tell you something.
Another plus – the rubber grip doesn’t leach out plasticizer and start to feel “gooey”, like many other poorly made products (such as the “rubber” grips my set of binoculars from a supposedly reputable name, or many cheap lamp cords and shower curtains, or the “Designer” brand of trimmer my original Wahl replaced).
A great product, does what it should, quality made and still competitive price-wise.

I used this product and it’s great. The shave is close and nice. The shaver feels solid in your hand and not cheap.
The delivery and service was excellent!

The main problem with the trimmer was that it shipped with an American plug only. I had to buy a US to UK plug converter to charge it. The combs supplied were only good for stubble or bushy beard. Nothing in between. Unit looks great and battery life is awesome.