I have been using the IMT medical PF300/301 for about a year now.. and have also used the fluke VT Plus.
Between these two i find the PF 300/301 better. It has a better UI and when you connect the analyzer to a computer.. we can clearly visualize the flow and pressure graphs and change the scales on both axis as we wish. The software also generates the report with the graph and the numeric parameters are user programmable, i.e, you can select the number and parameter you want to have on your report, wheras the VT that i have used did not allow for that.