Having just had a good think about the Avent breast pads, I'm in a good frame of mind to compare them to the Boots ones that I'm wearing at the moment. I'm in two minds about this pad. It scores points in two big areas for me, but less in others. They'll stay on my "would buy again" list, but probably down towards the bottom if I'm honest.

What I like:
Similar to the Avent pads, they are smaller in diameter than several of the other brands, which makes them more suited to those of us blessed (ha ha) with smaller breasts as we don't have the issue of them moving around as much. Along the same lines, they are a bit more padded so can add a bit towards that elusive next cup size should you want it. I find that they dont' show under my shaped nursing bra (Mothercare) but might do under a normal thin bra and tight clothing.

What is ok:
The pad itself is absorbent, though I'm at the past 6 month stage where I don't leak huge amounts despite my son still being quite the feeding parasite. I haven't had problems with them getting too full, or leaking on me even at night. When wet, you don't feel the moisture, and I've had no problems with sore nipples in these.

What's not so great:
There is NO sticky tab to keep these in place. I know most people complain about the lack of stickiness in other pads, but it's better than nothing- these little buggers do slide around, and I find I have to check they're in the right spot if I do start to leak.
They're a bit crinkly and paper-like sounding. I don't like that as I know people can't hear it, but it's just not nice sounding.
They're not made all that well- the outer rim around the pad itself is oversized, and on most of the pads actually uneven in width. It's a picky point, but one nonetheless.

Overall you get what you pay for with these. They're a cheaper option than the main brands, but it does show. I wouldn't want to use these in the first weeks of feeding as I'm not sure they'd hold up as well as others.