Speaker surround replacement

[David]

I have two sets of 20 year+ old speakers where the foam
surrounds on the woofers have deteriorated and are falling
apart. One set is Boston Acoustics A60s and the other is
Advent Legacies. These were nice sounding speakers and
surround replacement foam is not very expensive. I can buy
surround replacements for both from speakerworks.com but am
interested in hearing experiences of others who have
replaced the surrounds in these or other speakers before
doing it.

Thanks, David