It's a nice, conservative fund, around 38% equities (the exact percentage changes now and then). Over the years the share prices have kept up with inflation pretty nicely. It sheds some nice dividends, too.
https://personal.vanguard.com/us/funds/snapshot?FundId=0527&FundIntExt=INT (VWIAX) if you have over $100K to invest in it, or
https://personal.vanguard.com/us/funds/snapshot?FundId=0027&FundIntExt=INT (VWINX) for those with less than $100K in Wellesley.
So, for some of us it is a nice ER investment core. I have 30% Wellesley, as per my plan, and I am very happy with it. This is not a fund for brave, aggressive, young investors in the accumulation phase. This is a fund for cautious, conservative ERs.