Is Jailbreaking an iPhone a Good Idea?

I’ve written a couple of times about iPhones and my desire to have one. I’ve actually been doing a lot of research about them lately as I would like to replace my Dash with one. Thing is, I am currently with T-Mobile and I really don’t want to have to make a switch to AT&T right now. What I would like to do get an iPhone and then jailbreak it and hook it up with my T-Mobile sim card.

I have no worries about jailbreaking the iPhone as I’ve done it with my iPod Touch several times. What I want to know is how it works afterwards. I’ve seen a dozen videos that all end with someone calling their newly jailbroken iPhone. That’s all good and nice but how does it hold up? Is it as easy to send and receive text messages? Does voicemail work as it should? I just want to make sure that if I do jailbreak an iPhone that it works for me like it should. I haven’t really seen anything about those things out there. If there is something, please let me know. I’m definitely interesting to getting one after Apple releases the second generation iPhone in June.

So if you have jailbroken an iPhone or know someone who has, let me know how the experience is. I appreciate any comments.