I always go for cheaper parts but then ask your self this
"Would I buy a cheap 'man sheath' to save a few quid"
Of course the answer is that you could because it will have passed x,y,z saftey tests and be kite marked or whatever the hell it is........ultimately though to you want your man batter unleashing without consent?
Probably not and therefore you'll always have in the back of your mind that the little general might just flex his bicep and burst out thus ruining the enjoyment of your female liason or posh onionism.
If you don't want your enjoyment ruined or man batter unleashing then you'll probably buy a Durex.
Here endeth the lesson.