What do you want to do? we deal both but dropped ESI due to too many bugs.

Voicemail is the big concern.

If you go with the Aspire S the VM is a little weak but so is ESI's. If you go with an Apire M
then you can make it do just about anything. With the ESI, if you don't like the inskin VM tough your stuck with it, With the Aspires you can add a 3rd party VM. As far as simplicity ESI wins hands down, as far as flexability, Aspire wins hands down. As far as maintaining the hardware, Aspire S has a backboard with built in ports so if one goes bad you're a little stuck, ESI is the same way but your VM is also built in. (Note each system is expandable with additional cards ESI offers combo cards as well, 8 station 2 analog 2 trunk but the aspire is 8 station or 4 co or 4 analog (each has pros and cons)) The Aspire M is seperate cards from the processor card so that is a plus (but also additional cost) So far I have found the Aspire much more dependable (not 1 bad phone yet and we have 10x the amount Aspiree phones as ESI but maybe ESI quality has come up in the past year.)

The aspire is reletively new and all basic bugs seemed to be worked out, (minor bugs with multisite networking) but ESI was still addressing many basic issues as of last year and they have been artound for awhile. NEC is a huge company. ESI may not be around in 10 years (or they might be a huge company too).

As you can see there are many different things to consider.

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