Just to give you some advise on a good helper.
Do not let anyone degrade your dog. Depending on how old your dog is, it may take some time to get him into Schutzhund. A good helper won't just write your dog off. A Schutzhund place is very loud, very noisy, there is shooting, snapping, barking, rambling, yelling and whatnot. Don't feel bad if your dog is impressed by it. Don't think badly about your dog if he is impressed by the atmosphere.
Some dogs need a little bit of time to adjust to the situation but that doesn't mean anything, it depends on how fast your dog recovers from it.
Again, a good helper will give your dog time to adjust to the atmosphere. He'll let him watch.
If the helper expects your dog to chase him over the field and bite than it's a bad helper. Run, don't walk but run as fast as you can and look for another helper.
Listen how the other dog handlers talk about people, how they talk about their dogs and other handlers dogs.
If you can hear them degrading and downtalking other handlers and their dogs, see that you can find a different club. You can learn a lot about the club just by listening of what they have to talk about.
If he is more the nervous and anxious kind of dog I would suggest to do agility and tracking.
Agility will give him selfconfidence and tracking will boost the bond between the two of you.
Also, don't jump into the cold water, give him a LOT of time. Meet with the helper, don't go to the regular training hours because it might actually do more damage than any good.
The entire atmosphere might be to much for a dog that is a bit skittish. Build him up outside the training-hours.
Wow! Thanx a lot! A lot of good comments inhere.
First, we have noticed that Phenix REALLY love to thug. His bite is powerfull and he is tugging well and for a long time (don't know if I can say that lol). Also, if I say "Off", immediately, he stops. He doesn't get into this high level of excitation, he still very concentrated.
We, last winter, ran with Phenix in a huge field: each time I ran away, he came to me, hurt me in the legs or tried to "gently" bite my arm (not arsh or agressive, it was play). We NEVER teached him how to, he just do it. I don't know if it's a sign to be a good candidate.
I would love to do a lot of obedience with him before, and maybe some agility (but he pounds 95lbs, we've been told it was a little too much for agility) because he loves to jump, run, turn etc. (unsured about the tunel lol).
I don't want to "scrap" all the work we've done with him....I don't want him to get efraid by a bad helper you know....I, also, think the dog/owner shouldn't be degraded. I will never let someone degrades my dog.