The EK 101 Verbal is one of the few good resources for verbal practice. In fact, EK 101 Verbal and the TPRH Verbal Workbook are the only two verbal books I've seen highly recommended here on SDN.
On the other hand, the opinions surrounding the EK 1001 books (physics, organic chemistry, chemistry) are quite varying. I've personally used them, as they were recommended by SN2ed as part of the popular SN2ed MCAT study schedule. I'm halfway through the schedule now, and I just decided to stop using them. My complaint, which is similar to others that I've read, is that some of the questions are very poorly written, the majority are way too simple, with a sizable minority being overly complicated and convoluted. The questions are also not in the MCAT style. My advice would be to skip them and replace them with more helpful material that more closely resembles the real MCAT.
To recap: get the EK 101 Verbal, but pass on the EK 1001 series.