Daily workout suggestions (running): positive impact?

No one? Don't you do any sports and just wear it for fashion? 

Garmin-Brooks any suggestions? Today was my 4th successive unproductive workout (software 12.20). VO2 max down from 58 to 56 in a few days... Is it just a gimmick?

I think it's not a gimmick, it's overtraining, or something like that!

I don't use daily suggestions, though planning to try them out in a few weeks once I'm done with marathon recovery. From my past experience, both Garmin and Polar, every time you see VO2 Max drop it's a sign you aren't fully recovered, or the training indeed is becoming unproductive. Slowing down a bit, taking some rest outright, or going "sideways" and doing cross-training helps. Within 7-10 days I'd usually bounce back in much better shape.

I think Alex Hatchinson (of Endure! fame) mentioned recently an interesting paper on overtraining being caused by oxidative damage to muscles. Sure, it's just a paper, but it can explain why you can see a drop in performance without it being necessarily reflected in HR/HRV numbers. 

Hi Nick, if that is the case (and it probably is) you would expect the watch to suggest rest days and not (both threshold and basic) trainings who are successively unproductive, no?

I wouldn’t sweat it.  3 training sessions is not a lot to draw any conclusions from.  My training goes in and out of producting/maintaining/unproductive through the year at random times.  At first I micromanaged it but later on just monitored it but didn’t get hung up on it.  For me, it’s sometimes it’s weather related, sleep, or something else.  If you are getting slower after a month, then maybe it’s something I’d look into.  Obv if you went from zero to hero in your training in a very short period, then you could be overtrained.  My first sign of overtraining usually shows up as lousy sleep (waking up randomly at night).

I wouldn't trust my life or fitness to that Firstbeat algo. The suggestions are cool as they focus on different aspects of building fitness using different workout types, but there are clearly a lot of edge cases they don't cover well, yet.

Just yesterday my 7 Day training load was showing too high to produce positive results while 4-week Load Focus was showing Balanced and "balanced load should result in all round fitness benefits". This morning I had about 17 hours recovery left, went for a an hour-and-half easy hike/walk that called for 5 hours recovery afterwards. Guess what? Half an hour later my overall recovery is now down to 4 hours.

I think what I'm trying to say...

There's a lot of room for improvement in the suggestions and load/recovery bits. For example, yesterday I went for an 8 mile run. Polar would always suggest only recovery and/or mobility/stretching drills after something like that. MARQ, having full access to my workout history, still cheerfully recommended I do another 40 minute run...

I'm sure it will get better.

On another thought, if you want a much better AI algo, check out trainasone.com.  I've been using it for about 3 yrs now.  It works similarly but is much more advanced giving you calendars, letting you adjust training intensities and always recalculating plans on the fly.  You can also put in a target race and it will automatically taper you when the time is right, etc.   In my opinion, garmin should acquire them...(I have no affiliation to the co outside of being a user).

My conclusion after 2 months of consequent wearing the watch and following all running suggestions: if you want to detrain, use the daily workout suggestions!