In past the 3D printers mostly have small built envelope. The Makerbot, which is one of the leading for home use, offers 29.5 L X 19.5 W X 16.5 H CM and others float around that range. The OverLoad ProPlus of worth $499 has a cylindrical build volume of 26 by 17 cm. This means now people can print tall and long objects with the help of this wacky delta arm printer.
On the other hand there is a delta arm printer which consists of three main belts and this will help head of printer to move around all axes. A central filament at the top of the machine spool hangs and print on round heated belt. It prints gcode which needs program like Cura to run. Cura is an open source modeler it spit out the right code. In my opinion this could be a deal breaker as I would like to have a dedicated piece of software for individual printer, but 3D printing community provides tools like Cura makes it easier to use. (The OverLord ProPlus is a 3D printer for making really tall objects, n.d.)
Crowdfunded printers are having bad rap. The model I tested recently worked perfectly for me having minimum calibration and no setup required. I tend to print some objects which includes 1GB SD card. Similar printers are available in market in $499 but not with such a tall and wide build envelope of the OverLord. I am not supporting the reliability of machine but company has recently produced delta arm model having positive feedbacks. (The OverLord ProPlus is a 3D printer for making really tall objects, n.d.)