I've got a lot of Trend router bits. Some I have bought but I picked up a whole load when I bought up the contents of a workshop from an old guy who was giving up due to infirmity - most had never been used. I have been really pleased with them all and would not hesitiate to buy them if I'm looking for quality. On the odd time I needed a bit for a one-off job I've bought cheaper bits and they have done the job.
Trend is a big supplier in the UK and all the major outlets stock them.
If the price is right for you I don't think you will be dissapointed.