The Riverside model has decent freehub based gearing and is a very simple design which is very easy to maintain. I think its probably
Decathlon's best entry level bike. The only issue I can think of is Decathlon bikes have quite low weight limits so if you are a heavy rider maybe not ideal but that's it. I think their 20km range thing is because its a 1x gearing setup so has a limited gear range so could be more tiring. I really don't see any issues with the components and what wears out will be easy to replace with better parts. The only thing unknown perhaps is the bottom bracket everything else looks fit for purpose and long lasting. I'm sure the V brake mechanisms will be fine although brake block replacements could be a time for a better spec product. It's not a performance bike for sure just casual but I don't see a problem with that.
As I often point out over 95% of bikes sold in the world are steel, low cost bikes make up a huge percentage of sales in richer countries but when you move to Africa, Asia and South America it goes even more extremely to steel. There is nothing wrong with high tensile steel, its durable, dependable, comfortable and very long lasting but does have a weight penalty. A low value bike like this is far less of a thief magnet so there is a freedom to where you can ride it too.
I can't think of anything at
Halfords at the same price with a freehub based gearing system. I'm a huge fan of the Carrera Subway as a general purpose high quality bike but that is well over £100 more than this.
I also like the quill based stem of this Decathlon bike, not only does it have a range of frame sizes but the quill based stem means easy handlebar height adjustment so over time you can get the perfect bike fit which is difficult and expensive to do with threadless headsets. Once you have found your perfect bike fit you can use measurements from this bike to choose a more expensive bike with an accurate size as such bikes have far less sizing adjustments typically due to being more focused on being lower weight.