Sure, they may not allow programming that many people want but that is not untrustworthy. Casio's Prism was know before it was released. Many companies announce an upcoming product before it is actually released. I've seen that they were a very trust worthy company.
Wow! what makes you say all that? I have never heard of Ti lying to their customers before. As usual I am disappointed with the way that TI treats customers. In addition someone I know recieved an answer from TI concerning the cx 3D graping that said, since the product is not available yet all information is subject to change. Clearly TI made the announcement of a product that they don't have just to take the focus off of the Prizm which Casio has available. I can tell you that the interchangable keyboards for the nspire calc's don't apply to the CX model which is presently available only in the dreams of the people at ti, which is to say that you cannot obtain one and may never be able to obtain one so you should never believe anything that TI says. And they had better do it soon because the longer they wait, the more difficult it will be for them to get back into the game! Will people remember that the classpad has transforms that the nspire cx doesn't have? Not if Casio fails to incorporate other desirable stuff like a built in rechargable battery, 3d graphing of multiple surfaces, and a back lit color screen into their best calculator. Casio had a brief moment of superiority and now TI has surged back into the lead. I hate to say this but the lead that CAsio had with the Prism has been totally lost to the TI-nspire CX.
Get moving Casio! The prizm is a good device but now you need to upgrade your Classpad and do it quickly or the lead you had with the Prizm will be forgotten. Quite frankly I am a Casio fan but the Classpad looks pretty poor when compared to the new Ti-nspire CX CAS and I am sure that a lot of other Casio people are thinking the same thing. That would capture the programing community which TI has turned their back on for years. But you had better do something soon Casio before TI scoops you with transforms! Another thing that you can do Casio is release an SDK for the Prizm that compiles C or Assembly language into Prizm machine code. Then Casio will be ahead again because TI doesn't have Laplace/inverse Laplace transforms nor fast Fourier transforms.
Ok, TI announced it's Ti-nspire CX and Ti-nspire CX CAS, so now it is up to Casio to release it's Classpad with a color screen and some 3D graphing enhansements similiar to TI's 3D graphing of "multiple" surfaces.