Review (4/5): Not bad
Firstly when I opened the box and looked at my new Philips Norelco T780, I could see instantly the build quality is not very good. The comb is made of cheap flimsy plastic, and the general appearance of the trimmer looks very basic, big, almost 1980's in design, and in a way, amateur.
However, when I went to use it, the trimmer worked well, and as I have not used a vacuum trimmer before, I was very impressed by this feature. I hadn't liked previous trimmers which left hair all over the sink, and I liked the Norelco T780 was able to retain about 90% of the hair. For this reason I give it 4 stars.
Overall the Philips Norelco T780 has a very cheap build quality, but it does the job of trimming well, and the vacuum does a good job of retaining most of the hair. If you drop it on a hard floor from a reasonable height, the flimsy plastic comb is likely to break. but if you are careful with it, it may last you a few years.