Is Lenovo a good laptop brand? Or, does the specs matter?

Generally, Lenovo is a good brand with an overall positive feedback from its customers around the globe. It's the top supplier of PC laptop after Dell. But whenever you buy a laptop, make sure to take a detail look into specifications. Because as good the specs are, it will improve the system's performance.

Cheap laptops from any company are about the same and the detailed specifications count the most. It is only when getting to business level, gaming capable, and premium in size and robust parts that brands make a real difference and the good Lenovo laptops are very good. All laptops pretty much are assembled in China by other companies no matter what brand label. Good laptops will show improvements you hardly notice. Lenovo introduced a better DC input port on many models. Screen quality is as reviewed by independent evaluators and customers. Lenovo Thinkpads have great keyboards.
A good modern laptop will have a 240-256GB SSD instead of an HDD.
CPU performance is in this

Graphics performance here

If you showed two laptops with detailed specifications where reviews can be found, and tell me how the laptops are to be used, I can show you which is better and why.
Brand tends to influence buyers who know very little about computers. First it takes all non-brand information and THEN consider brand.

The specs matter regardless of the brand.