Been in Nimbus since 2005 when I think the ASIC 8/9's were out. They were a brilliant shoe, very comfortable and robust.
When the 10's came out I couldn't wear them as they were a lot narrower & the side lacing was uncomfortable so I had to buy 9's from the US.
I had problems with the 12's Developing holes on the inside heal areas after only a couple of weeks- Asics sent me replacements but they were all the same.
I'm now into the 13's and 14's & they are definitely making them that bit tighter in the toe box & also much much softer. I run approx 70miles per week & I'm getting through 2pairs every 2months (I alternate to save them but not helping).!!!!
The old nimbus 9's would have lasted me 6months alternating 2 pairs!!!!! In fact some of my old 9's that I still have look a lot fresher than my 14s that I have only been in for 2weeks!!!!
I have been getting more injuries lately in the foot/heal & Achilles areas which had never been problem before.
Think Asics need to go back to modeling the nimbus on the older versions, many of my athlete friends agree.
They are making the cushioning far to soft & so the midsole is not lasting anytime.
I have one of the hand held machines and one that cost £3000, I have experienced no major improvements with the ultra sound and you also have to make sure it is set at the correct frequency or you can do more damage.
My advise like many others is a little bit of everything helps, although I found getting deep massage from physio made it worse. This is my 3rd occurrance of PF and this time I do not touch it. I stretch, wear a stras sock or spilt at night, stretch before I get out of bed or if I have been sitting for long periods of time. I also have a little pedi roller, like the trigger point ones but cheaper and does the same job, it can be frozen also and it is now available in boots for under £5.
I have found a combination of hot/cold soaks works wonders and if you can do this a couple of times a day its grt. Also exercises with the toes like pulling a flat towel towards you and alsowalking on tip toes can work for some.
Hope you get some relief but I don't think the ultra sound is a good investment for PF, but can be used for lots of injury when you know what freq to set it at and how long to use it for - I always ask my physio first or you can google info on net. I works on how close the muscle/tendon etc is to the surface of the skin, the deeper the higher the freq. etc etc.
Well pleased, need a bit more off it now for CW standard but it was my first race of season so hoping for better next race Also PF has been pretty good, even after 12.5 laps in spikes Its not 100% but not much pain at all, actually have not felt it at all 2day, fingers x.