If you've got the money and don't feel the materials you have are letting the info sink in... go for it. Transenders is kind of pricey and with all the resources available for free, I just can't see parting with the cash.
I feel that with M. Meyers and Tcat, you should have it covered. Crank through the free practice tests mentioned earlier and I think you can do it. Good Luck!
A+,N+,S+,L+,I+,HTI+,CET,CST,CNST,CNCT,CFOT,CCNT,ACSP,ISA CCST3