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Hello! I decided to purchase OpusFSX today to see what I have been missing. I just completed my first test flight. I flew a route with two other weather engines that I have used prior to OpusFSX. Then used OpusFSX for the same flight. I'll first explain the test scenario and then my findings. (tldr -> Very good but annoying flight): ----- TEST SCENARIO: Flight from KUTS to KDFW. Date: 2013-01-25 (yesterday -> historic weather). Time: 17:15 UTC/Zulu. Airchaft: JS41, Fuel: 3000lbs, Payload: 0lbs. Route: DCT LOA LOA.CQY6.ILS17L (wanted to test tailwind landing a flying from VFR to IFR conditions) Here is the real world weather for the flight (numbers and colors show ceiling): Departure METAR (during planning/release): KUTS 251653Z AUTO 21010G14KT 10SM FEW027 22/14 A3018 RMK AO2 SLP215 T02170139 Destination METAR (during planning/release): KDFW 251653Z 02012KT 7SM OVC006 08/06 A3019 RMK AO2 SLP221 T00830056 ---- RESULTS: The transition from VFR conditions to the expected IFR conditions was better than I have ever seen. One other product does this quite nicely, but my first impression is that OpusFSX does this in a way that feels more realistic (at least to me). In grades from 1 to 10, I would score "other" product 7+ and OpusFSX 9 (you will soon find out why only 9) Just for comparison. Here are the OpusFSX generated weather conditions for departure and destination. Departure METAR (actual/OpusFSX generated): KUTS 251722Z 21310G14KT 9999 FEW030CU FEW400CI 22/14 Q1022 Destination METAR (actual/OpusFSX generated): KDFW 251836Z 00411KT 8046 OVC011ST FEW402CI 9/6 Q1022 Very good I would say! ---- PROBLEMS: During the flight, I was getting constant problems with windshear and outside preasure changes. I have yet to experience this kind of behavior with other weather engines. Here's a picture from FS Flight Keeper: The important columns are Type, Event and time. Look closely at the lines with type "Windshear" and "Preasure". You should see that during a span of 10 minutes they change quite frequently. FS flight keeper keeps nacking me about these changes. For example: preasure change from 1022.7 to 1023.0 => "Please check you altimiter setting". I heard A LOT of these during the trip Also for every windshear I receive this: "I don't like that wind, I think it's shearing". Had a lot of thos too. ----- QUESTION: Is this by design or is this possibly a bug? Preasure changes from 1022.7 to 1023.0 (delta: 0.3) seem quite small to warrant to be sent to FSX. Also the windshear was extremely "forcefull" from time to time. Thanks for the help! (I'm off to test the camera system)