I started lifting weights 16 years ago (1986). I went hard and serious for about the first 4 years, but college took too much time and I eventually stopped completely.
Up until May 2001, I have attempted to keep lifting on and off, but work, injuries, and various sicknesses kept me from maintaining a regular schedule.
In May 2001, I finally got my own apartment and spent $2400.00 on a Ironmaster 950 system with attachments, dumbbells, and free weights.
www.ironmaster.com
Finally, I was able to begin lifting again on a regular basis. OK, to the point of the thread.
I used to always do HIT from when I was 16-20. I got good results, but I didn't understand my muscles and how I needed time to rebuild and when tear the muscles down too much by doing 3-6 different exercises per muscle group, so I overtrained the whole 4 years. I would do around 8 reps mostly to failure. As soon as I could do 10 I would up the weight. I did this for every muscle group. I liked it. My results would of been so much better if I gave my muscles more rest.
I did BFL from May 2001 until about 2 months ago. Now I do every set to failure. Every week I swap between 4-7 reps and 8-11 reps to keep my muscles from adapting. Also, each week you can decide to do 2 sets for everything, or 3 or 4 sets to keep your muscles from adapting. I am not concerned with huge gains, since I am happy with the size of my main muscle groups. I am focusing on my supporting muscles now using this same technique.
I am definitely noticing faster gains using HIT than I did with BFL.
Doing a set to failure is so much easier than trying to figure out what 60%, 70%, 80%, etc. of your failure as in BFL.
Also, 1 exercise for each muscle group is enough when doing HIT.
If you see the BFL plan, they have you working each muscle group every 5 days. That is a great plan, and I recommend continuing with that routine.
I hope this infor helps.