I'm very sorry to have to say this, but service is just really bad (and to some extent dangerous).

My experience:
1) Far too much waiting time, staff does not seem to be organized at all.

2) Missing simple tools:
Apparently there was an issue with the back-wheel that needed the tool to remove the cassette, that was however not available. Luckily they have been able to simply swap the wheel from a presentation bike (that apparently had a few scratches, but that is more or less fine for me).
When I was in the store and like to get the left crank changed (have a left crank with a pomermeter). But who might have guessed that, they don't have a simple tool to remove the plastic cap of the left crank.
On a serious note, which bike seller does not have the right cassette remover available? I even have these tools personally (in Europe, and now as well here in HK). All these tools you can get in a standard simple bike toolbox for

The size chart of this bike is a little bit confusing customer, different Decathlong websites at different countries showing different height limit to the same size frame, better to try it in the store.

Recently upgraded to RC520 from an MTB two weeks back. Been waiting for the product to be available for last 6-7 months. Finally managed to order one online. No problems now in long distance. Already completed 500kms including a single 100km run. The ride is awesome. Initially there was a little issue with the shifting but the guys at DSI Vytilla sorted it out and now the ride is smoooooth. Will surely recommend to anyone who is planning a long distance ride. The sifting of the 105 group set is fantastic. Inclines are comfortable without even shifting onto the smaller chainring. Brakes are good. Choosing the correct bike size is important for a comfortable ride and I am once again thankful to the staff at DSI Vytilla in guiding me in selecting the correct size. Thanks Decathlon for an extremely nice product.

Upgraded recently from a hybrid bike to RC 520. Completed close to 400+ Km and thoroughly enjoying every bit of it. Very comfortable even on longer rides. Shimano 105 shifters are butter smooth. Highly recommended. Only downside is, bike is little heavier for this price.

Using for a week. Excellent comfort and control.

Superb

I have been using this bike since 3 weeks and have ridden almost 100 odd kilometers. For me this was an upgrade from a simple hybrid bike to a good entry level road bike. The bike handles really well and is very much comfortable for long rides. The seat position is also comfortable and ergonomic .
The Shimano 105 shifters and front and rear derailleurs are absolutely cracking and do not disappoint, a big highlight for me.

Thank you Decathlon for such a wonderful bike!

Really happy with the cycle will start doing longer rides to sync in

Nice

No match with Triban RC 520