It is possible and done all the time, pretty quick if I remember correctly. Their website could give you the time answer or call them.
They have to provide your trade info by law and with the new laws it should give you even more info and not have to figure anything out anymore.
Sidney also uses them and really likes them. You cannot buy EIGH through them and DO NOT TRANSFER EIGH SHARES TO THEM IF YOU HAVE THEM!!! Could cost you a lot to sell them with J2T.
You can transfer shares of other stocks without a problem. Like Maico said...don't transfer EIGH shares because you can't sell through J2T without extra fees right now.
I haven't had any problems with executions of any other stock.
They do have a tax center that uses Maxit as the software.