Do you own an F-machine Tremblr, if so could you please let me know if you think it was a good investment and worth the money you paid or not and if you enjoy it and what are the pro and cons of the machine and using it. I am interested in buying one or something similar so just looking for some feedback from those who have actually bought one and have the authority to comment, also interested in others comments on it even if you do not own one. Thanks for any replies.