I've actually had some experience with Quechua backpacks during my travels. They're quite popular among budget travelers, primarily because of their affordability and decent quality. In terms of durability, they should hold up well for typical backpacking adventures. However, if you plan on putting them through really tough conditions, they might show wear a bit faster than some of the more expensive brands.
Regarding comfort, Quechua backpacks generally have decent padding and adjustable straps, which help distribute the weight. It's really important to try them on with weight before making a decision, as fit can vary from person to person. As for waterproofing, many models come with a rain cover, which is a handy feature. Though if you're expecting really wet conditions, investing in additional waterproofing gear or using internal dry bags can be a good idea.
In terms of models, the Forclaz series often gets good reviews for their balance of comfort and functionality without breaking the bank. Some advanced features like ventilation channels or highly specialized compartments might be absent compared to high-end brands like Osprey or Deuter, but you usually get what you need for a backpacking trip.
Ultimately, Quechua can be a great choice if you're looking to save money without compromising too much on quality. If you have access to a Decathlon store, it’s worth trying a few models to see which one feels best for your needs. For additional insights, check out detailed online reviews or travel blogs that focus on gear comparisons.