Excellent product @ alejandrofz, it is great for those who love to build and design things. I'll leave you my comment on PROS and CONS.

Pros:

• They come available in 2 types of aluminum, chromed and black which makes the designs more pleasing to the eye.
• Different kits come that cover all the needs of the builders, and are available in all possible dimensions.
• All materials are made of aluminum which guarantees that they will not rust and all their nuts and bolts are M3.
• Its price is very low compared to other construction parts, and if you buy at wholesale you will get discounts of up to 15%.

Cons:

• None for this hunt.