I love igf1 lr3, it's my favourite product and this brand didn't disappoint.
Great pumps in the gym, I slowed my reps right down, concentrating a lot on lowering the negative slowly and it felt the skin covering my biceps as going to tear.
Usually work arms seperately but I found doing bi's and tris together worked well because I was having to leave too long rest between sets only focusing on one muscle.
Larger muscle groups the pump didn't happen as quick or as intense but by the end of the workout, looking very full.
Feel like the pump last a lot longer after exercise when using this product.