We recently purchased 2 of these bikes 24" & 26" . They where not to difficult to assemble though if you have not had much experience in this area you should supplement the manual with some of the you tube videos or consider having a bike shop do it for you. We had a minor problem with my wife's bike mainly because she has a bad leg and it can be difficult for her to get off the bike. I contacted the seller and got a very quick response and they were quick to offer suggestions and work out a solution. This was a very pleasant surprise for a change. After we began using the bikes we had a problem with 1 of the derailleurs' again the seller responded quickly and had a new part for us in a couple of day's. We love the bikes but what is most impressive is the level of customer support they gave us. That is something you can't always get at any price and makes us highly recommend this company. I will gladly do business with them in the future.