I'll have a stab - I'm no coach and have been using power for a little over a year, so will throw out some thoughts and look forward to hearing what the more experienced crowd think. Firstly I think you need to look at it in context - what has gone on before, whats next, what stage of your plan are you at, goals etc. It's like looking at one meal and saying "will this make me healthy?". I'm not familiar with that software and assume the grey dotted line is and accurate measure of current FTP... Having said that it looks a little 'light' to me. 3x15 at tempo doesn't seem very challenging, and the last interval was short and easier by a few watts. If working at that level i dont see why you'd want/need those long recovery intervals? If you were looking for a higher training load you could have done 3x15/20 closer to FTP, perhaps with 5 min recovery, and you could have done a 3x20 in the same time hitting closer to FTP. Alternatively you could have eliminated the rest and done a solid hour of tempo perhaps alternating the power outputs slightly to make it interesting eg 7 mins low-mid tempo and 3 mins high tempo repeated. Yesterday I was snowed in so decided to use about the same amount of time for a 3x20 at 91-93% FTP with 5 min recovery and that was a very achievable session racking up more L3/4 time for the same time on the bike. It wasnt so hard that I can't do another 90 min solid tempo session today as well. I just wish I had the absolute power numbers you did though - those are some numbers I can only aspire to for a good while yet!