I will be straight up 100% honest here. The Align frame on the 150 is weak, and even hovering around, there was a tail wag because of the weak frame. Once I put this MH frame on, the tail wag went away. Since you already get the aluminum swash and DFC links, the ONLY upgrade that I would suggest is the Frame. And I'm loving this new 15105 frame vs the 15105X frame. Not that there is anything wrong with the X frame, I just like the ability to replace individual pieces if they break in a crash.
The 150 is a great helicopter to have with you and just toss in the air when you get the itch. You can keep it in the box it came in and keep it in your car. Mind you, don't keep the batteries in a hot car. But, you can take it anywhere you go.
I will be doing a final thought video soon on the 150 where I give the goods and bads of the helicopter. Need to head to the post office to pick up some more tools and parts for it. Yes, upgrades again this time, but these are, IMO, required as well. What are they? You will just have to wait for the video hehe.