Hello Fred,
Fred they are brilliant,if you have got to the stage as I have(arthiritis)and all that,they are a damn good investment.No more pushing and pulling your caravan into position,you can after practice park your caravan on a sixpence,the finest investment we have ever made caravanwise.Powertouch is one of the better ones.Have a look on www.Powerwheel.com they give you a 5year warranty and they will come to you to fit it.Ok its a lot of money but well well worth go on Fred treat yourself.Good luck and happy caravanning.Jim