I did read the reviews and it seems that there is some disagreement of whether it is solid core or not. Most of the reviews are very positive but the less than $10 cost for 100' made me a bit nervous. There's lots of brands out there that all seem to say the same thing. I only have one chance to do this right. Price doesn't always equate to quality and in this case I think I just answered my own question...... As always, your advice is very much appreciated.