A club can be beaten with a small hack saw. Just cut through the steering wheel. Goes even quicker with a battery Sawzall.
Almost nothing is 100% effective. The goal is to get them to move to an easier target. Both methods do that.
Well, yeah, like a car thief is going to roll up with a set of tools.... I worked at a dealer many years ago when I drove my 1990 Suburban. I used the club. All my fellow employees gave me endless grief about how cutting the steering wheel, freezing the club with freon and whacking it with a hammer... yada yada yada.. SOO easy to steal it!
I was called dumb for the effort.
This was back when those chevy's were second only to Honda Accords (Accords were the number one car stolen then)
A technician from our Mitsubishi division was an ex-con reformed car thief. He overheard all this chiding and ridiculing me using the club.... One day he told me about his job as a gang member in his bad days which was stealing cars. He told me that he nor anyone he knew in the business of stealing cars carried tools other than a screwdriver. His advice was to ignore those people and keep on using the device (which I was doing regardless of the advice).
My suburban never got stolen.
My customer who uses his club on his 2006 GMC Sierra due to his prior Sierra being stolen, has had no attempts of theft upon this one in the 3 years that he's owned it. He only had his prior one about 6 months.
In a nutshell, if they want to steal it badly enough, they will, but, to quote the fellow employee who actually once stole cars for a living told me "We went after the easy marks... keys left in the ignition, doors unlocked, etc." He stated that he never saw or knew of car thieves who toted tools around to steal cars other than a screwdriver. And that won't trump a Club. I use the Club on my Ranger. I still have the Ranger.