Engine oil syphoning - Yay or nay?

[200bhp]

I was in the local motor factors earlier and they have an engine oil syphon kit on offer. It got me wondering if it would be possible to carry out an oil change using just a length of clear tube and a waste oil container (A lot cheaper that their pump/kit).

I've done a quick google and opinion seems divided on this with some people saying swarf and metal parts wont get picked up this way, but they would come out of the drain hole if done traditionally.

So what's the PH opinion on draining the oil using a syphon?

Obviously I'd change the filter too but that can be done easily from above.