I don't want to sound like a broken record but I did not feel that the thinner gauges of cyclone held tension very well. I'm currently using msv 18l (1.10mm) and I recently tried cyclone 18g (1.20mm).
It played amazing the first two sessions but after that it felt like the tension maintenance fell off a cliff.
I string myself and I wouldn't say money is an issue but I didn't want to be stringing my racket after two sessions (6 hours total). I'm currently restringing around 15 hours max with my set up with msv hex.
Some people say cyclone holds tension well, but I had different results which are more in line with tennis warehouse university’s results. For a comparison I picked two gauges which were similar in thickness.
Focus Hex 17L (1.18 ) strung at low tension (40 lbs) had a total tension loss of ~17.9 lbs (45%)
Focus Hex 17L (1.18 ) strung at med tension (51 lbs) had a total tension loss of ~13.7 lbs (27%)
Focus Hex 17L (1.18 ) strung at high tension (62 lbs) had a total tension loss of ~16.6 lbs (28%)
Cyclone 18 (1.20 ) strung at low tension (40 lbs) had a total tension loss of ~22.5 lbs (56%)
Cyclone 18 (1.20 ) strung at med tension (51 lbs) had a total tension loss of ~24.3 lbs (48%)
Cyclone 18 (1.20 ) strung at high tension (62 lbs) had a total tension loss of ~26.0 lbs (42%)
http://twu.tennis-warehouse.com/learning_center/reporter.php
In instances the tension difference was 10 lbs which is huge! If you are stringing at a mid tension there is almost a 20% difference in tension loss between strings. Maybe the fact I use thinner gauge strings skew this test, but I just love the thinner strings in a dense string pattern.
Everyone’s results will vary and everyone is entitled to their own opinions, but I liked the plain jane msv hex more. It doesn’t stand out in any area but its predictable with a very gradual drop in tension, which is why I sold my reel of cyclone and purchased another reel of msv hex.
The price of 5 dollars a set with a reel is also nice =)