Plastic
If you don't want all the trouble of soldering (flux and solder every where, joints not running properly, scorch marks....) and would like a cheaper faster way to work then consider using plastic instead. Nearly all pipes and fiitings that you could get for copper are available in plastic.
Here are some advantages and disadvantages.
Advantages:
No soldreing required.
Easy to piece together.
Very little plumbing knowledge required to use.
Cheaper than copper.
Quicker to install.
Very flexible so no need for bends.
Doesn't corrode or rust.
You are able to push in and take out the pipe from the fittings as many times as you like (easier to replace incorrectly cut pipe).
Disadvantages:
It bows too much making it unsightly if on show.
Vermin can chew through it causing leaks.
Not trusted by some who prefer the "solidness" of copper.
Cannot be connected direct from boiler because it is too hot.
The pressure rating of plastic pipe decreases with temperature.
Push fit joints are bigger and uglier than there metal counterparts.
Cannot be used on gas.
