[Thinking about buying Mini 3D 3D printer from monoprice]

You need to check the features of the printer before buying it. There are a lot articles present on the web that may help you select the right printer for you depending upon the application.

Choosing a 3D printer requires good knowledge as a wrong decision will through whole of your money in vain. If you are having good knowledge, then you can go for it otherwise I would suggest to take help from experts or read some posts to know more before making any decision.

[After half of the print, print goes wrong]

I think there is some problem with your printer. It may be due to high temperatue. One of my friend was facing the same problem, but in that case nozzle was not working fine. We change the nozzle and get good prints. If your nozzle is fine, then high temperature may be one of the reason.

[Ultimaker Session 7th of May]

I missed this session. Can you Please let me know the upcoming sessions?