The T970 Sets a Good Standard
I have been using one for about a year.  But, recently, I had to replace it because, while in the UK, I inadvertently, plugged the charger into 220V. I could have purchased a replacement charger but, a few months back, my son dropped the trimmer in the sink and it then stopped locking on the depth setting, requiring that I hold the dial fixed while grooming.  So, I had a choice, do I buy a full replacement or look around for anything better?  All the reviews I could read (and I read a lot), didn't turn up anything that looked better than what I had been using.  Why 4 out of 5 stars?  Well, the drop in the sink was not that jarring.  It should not have broken so easily.  Also, it does suck up 80% of the hair but 100% would be the gold standard. Still, 80% is better than the mess I used to have to clean out of the sink. Also, my first unit had a battery that didn't hold a good charge.  I am pleased to say that the replacement unit lets me get about 4 trims of my goatee before recharging
Rating: 4 stars