Is the Legion 5i Pro good for gaming?

Yes. The NVIDIA GPU and Intel CPU handle modern games at the screen's native 2560 x 1600 resolution with settings tuned. It is a mainstream gaming laptop rather than an ultraportable.

Is the 2560 x 1600 screen worth it over a 1080p panel?

The taller, sharper panel is the main reason to pick this model. Text and games look crisper, but the higher resolution asks more of the GPU, so expect to lower some settings in demanding titles.

How is the battery life?

Short. Gaming unplugged drains it quickly, so treat it as a laptop that lives near a charger. Light browsing and video last longer but still trail thin-and-light laptops.

Can I upgrade the RAM and storage?

Yes. The Legion 5i Pro has accessible memory slots and an M.2 slot, so you can add RAM and a second SSD. Check the exact model's slot count before buying parts.

Is it too heavy to carry to class?

It is on the heavy side for a 15-inch laptop, and the power brick adds more. It works as a desk-first machine that moves occasionally rather than a daily commuter.