It depends on what you're planning to shoot. For long range, they do not have enough windage unless you also have a windgauge front sight. As far as quality, there are better out there but it also depends on how much you want to spend. For $250.00 you can get a Ron Hielman sight which is better and at about the lowest cost.
Having said all that, I personally have at least 6 sets of Browning sights. Some are on BPCRs and only once did they fail me. At the Quigley shoot, I ran out of windage (but so did a lot of others!!). I have also bought them cheaply and put them on my Win .22 and a Browning 38-55 Hunter model. If the price is good enough, they work just fine. If you have a few extra bucks, go with the Hielman.
Doz