is it worth purchasing? I already have a high end laptop
Mine just arrived last week. 64gb and I swapped out the SSD with a 1TB.
If you can already play newer games with higher graphical settings and can get higher frame rates probably not unless you want something more portable. For me it was chugging in Uncharted 4 even when I had it at the lowest settings. And then for a game like that, the battery reports up to 2 hours of battery. However a side scrolling indie game looked and played pretty good.
I want to try using it more with older games that would be less stressful on the hardware so I could get more battery out of it.
Will probably try dual booting Windows at some point here soon for the heck of it here soon.