Certainly it is more expensive than many products that are meant equivalent, but nothing beats Pyrex. It is not for nothing that this brand sells all glassware usitée chemistry. Solid, do not wear out, go in the oven, microwave, resists thermal shock etc ... Apart negligence and try to warm its contents on a gas stove, little can break it.
Transparency is also very useful to see if your preparation is well mixed.
