Has the Union been Good or Bad for Scotland?

In 1707, the Scottish parliament, in passing the Union with England Act, voted to abolish itself. But three hundred years later, the majority of Scottish MPs who sit in the British parliament are demanding an end to the Union with England and the revival of Scotland as an independent nation. Was the Union a brilliant merger which allowed Scotland to take an outsized share of the wealth and power created by the British Empire? Or was it a hostile takeover which allowed England to subjugate the Scots and steal their natural resources?