It is a good solid stand made mostly from heavy metal, but it does have a couple of problems. (I will use part names from the instructions to explain.) First, the clamp between the "telescopic bar" and the "upright" is plastic. It arrived broken in the box. Whoever boxed it should understand that if you put it in the box broken, the customer will remove it from the box broken. I did not return it as broken because I was able to Gorilla Glue it back together and it works fine; it clamps tight enough to hold the telescopic bar in place. Second, the "bike support stand" (the horizontal bar at the top that holds the bike), when attached to the seat support does not grip tight enough to hold the bike in the position I set because there is too much weight from the front of the bike. The torque causes the bike to rotate until the front wheel is on the ground. That is not enough for me to return the stand because I seldom work on the front wheel and if I do I can attach the stand to the top horizontal of the bike frame. I think they could fix the problem by not making the "bike support stand" so smooth, give that part a sandpaper like finish or put rubber fingers inside the clamp so the part does not slip under the torque from the weight of the front of the bike. I might rough up the stand part with sandpaper, or put small grooves in it to give the clamp something to grip on to see if that solves the problem. Third, the clamp holding the bike frame even at full tight will not keep the bike from rotating around the frame. It is not enough for me to send the stand back, just a minor annoyance. The problem is there is smooth plastic trying to clamp a smooth metal frame. I think they could fix this by putting thin rubber pads in the clamp. I will probably run out and get some pads to try that out. I think it is a good stand for the price. The stand itself is made from much heavier metal than I expected. It is very stable with the four legs. I easily overcame all the issues so I kept it.
Man, if you're starting out and you know you'll need several components for a bag... just get this. It will save you so much time picking everything out that even if you balk at the price (amazing value, by the way) I bet that if you did the math using your hourly wage and the time spent picking everything out and making sure it fits... you'd save a lot of money and a lot of irritation if you just got this. Just get this.
The Bicycle Repair Shop does rentals by the hour or by the day. They have reasonable rates. They have solid, lightweight hybrid bikes so you can tackle train tracks and brick streets and hills. They also have road bikes for the more experienced. You can reserve online in advance. You get a helmet and a lock with your rental. The staff in the shop are friendly and will suggest routes and point out hills if you're new to the area. And believe me these hills are no joke!
Modern bottom brackets use a sealed bearing type construction that keeps water and debris locked out, so they seldom go wrong. Maintenance is impossible so they need replacing when they do wear out. Older style cup bottom brackets need to be re-greased every now and again, and occasionally will need to have their bearings replaced. There are a lot more teeth on the chainring cogs than those on the rear cassette, so need changing less regularly. Cranks usually a solid one piece construction so there is not much to go wrong.