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As I cycle quite often, and for long distances at times, I was in need of a sturdy, reliable backpack. And after extensive reading on the internet, and asking many friends, I was recommended to use this one, the Deuter Guide 35 + . I had personally never heard of it before, but it was supposed to be very durable, so I went with it and purchased it. It cost me around £100 if I remember right. I might have been able to get it cheaper elsewhere, but I chose Amazon as I had a voucher I had to spend. It arrived about 3 days after, and I got ready to try it out.
Though I have never used it to go hiking or skiing etc., one of my close friends also owns one (from my own recommendation) and he does use it for these things. He has commented that it does well in tough conditions, and is still in great condition.
What I found when I used it was that this rucksack is very impressive. It did everything my friends said it would, and more. Not only is it very comfortable (even with a heavy load), it is surprisingly light. This amazed me, as it looks as though all the padding etc. would make it rather heavy, but I was proved wrong. I can't remember the exact amount it holds, as I brought it a while ago, but I believe it was around 8-9kg.
The rucksack also comes with some attachments which are handy, depending on what kind of activity you are going to use it for. It came with a ski pole attachment (useful for my friend), an place to put an ice axe, as well as many gear loops for other various equipment.
One useful things is the shape of the rucksack as well, as it is long and straight, it suits taller people. The downside is of course if you are very short it might work as well.
By far the best feature for me is the hip belt. Not only is it detachable, for if it isn't needed, it also makes the rucksack more stable and easier to balance on your back. I thought it would make the bike ride uncomfortable and it would rub on my body perhaps, but it didn't. I could barely feel it for some of the ride. It has a side zip for easy access to the main compartment of it as well.
The real downside of the product for me is the price. Though it is a great rucksack, it is very expensive, which rules out several people from buying it. And I know that a lot of rucksacks are pricey, so it isn't that strange, but it is a shame.
If you need a rucksack, I would recommend this, though only if it would be well used. If you only rarely need to use it then it definitely is not cost effective. However, if it would be used a lot then this is the perfect rucksack for you. I give it 4/5 stars, it would have 5 stars, but the price lets it down for me.