I started using Betterment because I thought their UI was pretty. Yes, I realize they take fees (although I get a special deal for reasons despite having a sma

I started using Betterment because I thought their UI was pretty. Yes, I realize they take fees (although I get a special deal for reasons despite having a smaller account). Yes, all things being equal, leaving my money in a Vanguard Target Fund would probably result in higher gains (heck, my 401k is still in a Vanguard Target Fund since it's set-and-forget). But the Betterment UI makes putting in more money as simple as typing in a number and clicking two buttons -- so I feel compelled to save more ($50 here, $100 there). And that, to me, is worth the 0.15% fee that they charge.